Latest working kernel version: None Earliest failing kernel version: 2.6.18 Distribution: Ubuntu Hardware Environment: Any Problem Description: I have a testcase that demonstrates a strange hang of the latest kernel (as well as previous ones). In the process of investigating the NPTL, we wrote a test that just creates a bunch of threads, then does a barrier wait to synchronize them all, after which everybody exits. That's all it does. This works fine under most circumstances. Unfortunately, we also want to do profiling, so we catch SIGPROF and turn on ITIMER_PROF. In this case, at somewhere between 4000 and 4500 threads, and using the NPTL, the system hangs. It's not a hard hang, interrupts are still working and clocks are ticking, but nothing is making progress. It becomes noticeable when the softlockup_tick() warning goes off after the watchdog has been starved long enough. Sometimes the system recovers and gets going again. Other times it doesn't. I've examined the state of things several times with kdb and there's certainly nothing obvious going on. Something, perhaps having to do with the scheduler, is certainly getting into a bad state, but I haven't yet been able to figure out what that is. I've even run it with KFT and have seen nothing obvious there, either, except for the fact that when it hangs it becomes obvious that it stops making progress and it begins to fill up with smp_apic_timer_interrupt() and do_softirq() entries. I've also seen smp_apic_timer_interrupt() appear twice or more on the stack, as if the previous run(s) didn't finish before the next tick happened. Steps to reproduce: I'll attach a testcase shortly.
Created attachment 14727 [details] Testcase. Build with gcc -D_GNU_SOURCE -c hangc-2.c -o hangc-2.o gcc -lpthread -o hangc-2 hangc-2.o Run with hangc-2 4500 4500
Reply-To: akpm@linux-foundation.org On Wed, 6 Feb 2008 16:33:20 -0800 (PST) bugme-daemon@bugzilla.kernel.org wrote: > http://bugzilla.kernel.org/show_bug.cgi?id=9906 > > Summary: Weird hang with NPTL and SIGPROF. > Product: Process Management > Version: 2.5 > KernelVersion: 2.6.24-rc4 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: high > Priority: P1 > Component: Scheduler > AssignedTo: mingo@elte.hu > ReportedBy: fmayhar@google.com > > > Latest working kernel version: None > Earliest failing kernel version: 2.6.18 > Distribution: Ubuntu > Hardware Environment: Any > Problem Description: > I have a testcase that demonstrates a strange hang of the latest kernel > (as well as previous ones). In the process of investigating the NPTL, > we wrote a test that just creates a bunch of threads, then does a > barrier wait to synchronize them all, after which everybody exits. > That's all it does. > > This works fine under most circumstances. Unfortunately, we also want > to do profiling, so we catch SIGPROF and turn on ITIMER_PROF. In this > case, at somewhere between 4000 and 4500 threads, and using the NPTL, > the system hangs. It's not a hard hang, interrupts are still working > and clocks are ticking, but nothing is making progress. It becomes > noticeable when the softlockup_tick() warning goes off after the > watchdog has been starved long enough. > > Sometimes the system recovers and gets going again. Other times it > doesn't. I've examined the state of things several times with kdb and > there's certainly nothing obvious going on. Something, perhaps having > to do with the scheduler, is certainly getting into a bad state, but I > haven't yet been able to figure out what that is. I've even run it with > KFT and have seen nothing obvious there, either, except for the fact > that when it hangs it becomes obvious that it stops making progress and > it begins to fill up with smp_apic_timer_interrupt() and do_softirq() > entries. I've also seen smp_apic_timer_interrupt() appear twice or more > on the stack, as if the previous run(s) didn't finish before the next > tick happened. > > Steps to reproduce: > > I'll attach a testcase shortly. > It's probably better to handle this one via email, so please send that testcase vie reply-to-all to this email, thanks.
On Wed, 2008-02-06 at 16:50 -0800, Andrew Morton wrote: > It's probably better to handle this one via email, so please send that > testcase vie reply-to-all to this email, thanks. Testcase attached. Build with gcc -D_GNU_SOURCE -c hangc-2.c -o hangc-2.o gcc -lpthread -o hangc-2 hangc-2.o Run with hangc-2 4500 4500
Reply-To: parag.warudkar@gmail.com On Wed, 6 Feb 2008, Frank Mayhar wrote: > On Wed, 2008-02-06 at 16:50 -0800, Andrew Morton wrote: > > It's probably better to handle this one via email, so please send that > > testcase vie reply-to-all to this email, thanks. > > Testcase attached. > > Build with > gcc -D_GNU_SOURCE -c hangc-2.c -o hangc-2.o > gcc -lpthread -o hangc-2 hangc-2.o > > Run with > hangc-2 4500 4500 FWIW this is not reproducible on 2.6.24/x86/CentOS-51. (I tried running it nearly 1500 times in a loop.) Assuming those many tries are sufficient to reproduce this bug, there seems to be something specific to the environment/architecture/configuration that's necessary to trigger it. It might be helpful to provide full details like glibc version, compiler version, .config etc. Parag
Please fix your test program. There is at least one bug in your test program: pthread_barrier_init() is initialized with count nthreads + 1 while pthread_barrier_wait() is only called nthreads times. Furthermore, creating threads without detaching or joining them is a dubious practice. You should call pthread_join() and pthread_barrier_destroy() (in that order) before calling exit(). If you would have done that, you would already have noticed the aforementioned bug yourself.
Reply-To: ariveira@gmail.com El Wed, 6 Feb 2008 21:57:38 -0500 (EST) Parag Warudkar <parag.warudkar@gmail.com> escribió: > > > On Wed, 6 Feb 2008, Frank Mayhar wrote: > > > On Wed, 2008-02-06 at 16:50 -0800, Andrew Morton wrote: > > > It's probably better to handle this one via email, so please send that > > > testcase vie reply-to-all to this email, thanks. > > > > Testcase attached. > > > > Build with > > gcc -D_GNU_SOURCE -c hangc-2.c -o hangc-2.o > > gcc -lpthread -o hangc-2 hangc-2.o > > > > Run with > > hangc-2 4500 4500 > > FWIW this is not reproducible on 2.6.24/x86/CentOS-51. (I tried running > it nearly 1500 times in a loop.) Assuming those many tries are sufficient > to reproduce this bug, there seems to be something specific to the > environment/architecture/configuration that's necessary to trigger it. > > It might be helpful to provide full details like glibc version, compiler > version, .config etc. I can reproduce it on my Ubuntu 7.10 kernel 2.6.24 Note i use CC=gcc-4.2 gcc --version gcc-4.2 (GCC) 4.2.1 (Ubuntu 4.2.1-5ubuntu4) If some fields are empty or look unusual you may have an old version. Compare to the current minimal requirements in Documentation/Changes. Linux Varda 2.6.24 #2 SMP PREEMPT Fri Jan 25 01:05:47 CET 2008 x86_64 GNU/Linux Gnu C 4.1.3 Gnu make 3.81 binutils 2.18 util-linux 2.13 mount 2.13 module-init-tools 3.3-pre2 e2fsprogs 1.40.2 jfsutils 1.1.11 reiserfsprogs 3.6.19 pcmciautils 014 PPP 2.4.4 Linux C Library 2.6.1 Dynamic linker (ldd) 2.6.1 Procps 3.2.7 Net-tools 1.60 Kbd [opcion...][archivo Console-tools 0.2.3 Sh-utils 5.97 udev 113 wireless-tools 29 Modules Loaded af_packet binfmt_misc rfcomm l2cap bluetooth ipv6 powernow_k8 cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_ondemand freq_table cpufreq_conservative nf_conntrack_ftp nf_conntrack_irc xt_tcpudp ipt_ULOG xt_limit xt_state iptable_filter nf_conntrack_ipv4 nf_conntrack ip_tables x_tables kvm_amd kvm w83627ehf hwmon_vid lp snd_hda_intel arc4 ecb blkcipher cryptomgr crypto_algapi snd_pcm_oss snd_mixer_oss snd_pcm snd_mpu401 snd_mpu401_uart snd_seq_dummy rt2500pci rt2x00pci rt2x00lib snd_seq_oss rfkill snd_seq_midi input_polldev snd_rawmidi crc_itu_t snd_seq_midi_event snd_seq mac80211 usbhid snd_timer snd_seq_device cfg80211 usblp ff_memless snd eeprom_93cx6 nvidia i2c_ali1535 i2c_ali15x3 evdev snd_page_alloc sr_mod cdrom button soundcore uli526x 8250_pnp 8250 serial_core i2c_core k8temp hwmon parport_pc parport pata_acpi pcspkr rtc floppy sg ata_generic ehci_hcd r8169 ohci_hcd usbcore unix thermal processor fan fuse # # Automatically generated make config: don't edit # Linux kernel version: 2.6.24-rc8 # Thu Jan 24 19:29:41 2008 # CONFIG_64BIT=y # CONFIG_X86_32 is not set CONFIG_X86_64=y CONFIG_X86=y CONFIG_GENERIC_TIME=y CONFIG_GENERIC_CMOS_UPDATE=y CONFIG_CLOCKSOURCE_WATCHDOG=y CONFIG_GENERIC_CLOCKEVENTS=y CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y CONFIG_LOCKDEP_SUPPORT=y CONFIG_STACKTRACE_SUPPORT=y CONFIG_SEMAPHORE_SLEEPERS=y CONFIG_MMU=y CONFIG_ZONE_DMA=y # CONFIG_QUICKLIST is not set CONFIG_GENERIC_ISA_DMA=y CONFIG_GENERIC_IOMAP=y CONFIG_GENERIC_BUG=y CONFIG_GENERIC_HWEIGHT=y CONFIG_ARCH_MAY_HAVE_PC_FDC=y CONFIG_DMI=y CONFIG_RWSEM_GENERIC_SPINLOCK=y # CONFIG_RWSEM_XCHGADD_ALGORITHM is not set # CONFIG_ARCH_HAS_ILOG2_U32 is not set # CONFIG_ARCH_HAS_ILOG2_U64 is not set CONFIG_GENERIC_CALIBRATE_DELAY=y CONFIG_GENERIC_TIME_VSYSCALL=y CONFIG_ARCH_SUPPORTS_OPROFILE=y CONFIG_ZONE_DMA32=y CONFIG_ARCH_POPULATES_NODE_MAP=y CONFIG_AUDIT_ARCH=y CONFIG_GENERIC_HARDIRQS=y CONFIG_GENERIC_IRQ_PROBE=y CONFIG_GENERIC_PENDING_IRQ=y # CONFIG_KTIME_SCALAR is not set CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config" # # General setup # CONFIG_EXPERIMENTAL=y CONFIG_LOCK_KERNEL=y CONFIG_INIT_ENV_ARG_LIMIT=32 CONFIG_LOCALVERSION="" CONFIG_LOCALVERSION_AUTO=y CONFIG_SWAP=y CONFIG_SYSVIPC=y CONFIG_SYSVIPC_SYSCTL=y CONFIG_POSIX_MQUEUE=y # CONFIG_BSD_PROCESS_ACCT is not set # CONFIG_TASKSTATS is not set # CONFIG_USER_NS is not set # CONFIG_PID_NS is not set # CONFIG_AUDIT is not set CONFIG_IKCONFIG=y CONFIG_IKCONFIG_PROC=y CONFIG_LOG_BUF_SHIFT=16 # CONFIG_CGROUPS is not set CONFIG_FAIR_GROUP_SCHED=y CONFIG_FAIR_USER_SCHED=y # CONFIG_FAIR_CGROUP_SCHED is not set # CONFIG_SYSFS_DEPRECATED is not set CONFIG_RELAY=y CONFIG_BLK_DEV_INITRD=y CONFIG_INITRAMFS_SOURCE="" # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set CONFIG_SYSCTL=y # CONFIG_EMBEDDED is not set CONFIG_UID16=y CONFIG_SYSCTL_SYSCALL=y CONFIG_KALLSYMS=y # CONFIG_KALLSYMS_ALL is not set # CONFIG_KALLSYMS_EXTRA_PASS is not set CONFIG_HOTPLUG=y CONFIG_PRINTK=y CONFIG_BUG=y CONFIG_ELF_CORE=y CONFIG_BASE_FULL=y CONFIG_FUTEX=y CONFIG_ANON_INODES=y CONFIG_EPOLL=y CONFIG_SIGNALFD=y CONFIG_EVENTFD=y CONFIG_SHMEM=y CONFIG_VM_EVENT_COUNTERS=y CONFIG_SLUB_DEBUG=y # CONFIG_SLAB is not set CONFIG_SLUB=y # CONFIG_SLOB is not set CONFIG_SLABINFO=y CONFIG_RT_MUTEXES=y # CONFIG_TINY_SHMEM is not set CONFIG_BASE_SMALL=0 CONFIG_MODULES=y CONFIG_MODULE_UNLOAD=y # CONFIG_MODULE_FORCE_UNLOAD is not set CONFIG_MODVERSIONS=y # CONFIG_MODULE_SRCVERSION_ALL is not set CONFIG_KMOD=y CONFIG_STOP_MACHINE=y CONFIG_BLOCK=y CONFIG_BLK_DEV_IO_TRACE=y CONFIG_BLK_DEV_BSG=y CONFIG_BLOCK_COMPAT=y # # IO Schedulers # CONFIG_IOSCHED_NOOP=y CONFIG_IOSCHED_AS=y CONFIG_IOSCHED_DEADLINE=m CONFIG_IOSCHED_CFQ=m CONFIG_DEFAULT_AS=y # CONFIG_DEFAULT_DEADLINE is not set # CONFIG_DEFAULT_CFQ is not set # CONFIG_DEFAULT_NOOP is not set CONFIG_DEFAULT_IOSCHED="anticipatory" CONFIG_PREEMPT_NOTIFIERS=y # # Processor type and features # CONFIG_TICK_ONESHOT=y CONFIG_NO_HZ=y CONFIG_HIGH_RES_TIMERS=y CONFIG_GENERIC_CLOCKEVENTS_BUILD=y CONFIG_SMP=y CONFIG_X86_PC=y # CONFIG_X86_ELAN is not set # CONFIG_X86_VOYAGER is not set # CONFIG_X86_NUMAQ is not set # CONFIG_X86_SUMMIT is not set # CONFIG_X86_BIGSMP is not set # CONFIG_X86_VISWS is not set # CONFIG_X86_GENERICARCH is not set # CONFIG_X86_ES7000 is not set # CONFIG_X86_VSMP is not set # CONFIG_M386 is not set # CONFIG_M486 is not set # CONFIG_M586 is not set # CONFIG_M586TSC is not set # CONFIG_M586MMX is not set # CONFIG_M686 is not set # CONFIG_MPENTIUMII is not set # CONFIG_MPENTIUMIII is not set # CONFIG_MPENTIUMM is not set # CONFIG_MPENTIUM4 is not set # CONFIG_MK6 is not set # CONFIG_MK7 is not set CONFIG_MK8=y # CONFIG_MCRUSOE is not set # CONFIG_MEFFICEON is not set # CONFIG_MWINCHIPC6 is not set # CONFIG_MWINCHIP2 is not set # CONFIG_MWINCHIP3D is not set # CONFIG_MGEODEGX1 is not set # CONFIG_MGEODE_LX is not set # CONFIG_MCYRIXIII is not set # CONFIG_MVIAC3_2 is not set # CONFIG_MVIAC7 is not set # CONFIG_MPSC is not set # CONFIG_MCORE2 is not set # CONFIG_GENERIC_CPU is not set CONFIG_X86_L1_CACHE_BYTES=64 CONFIG_X86_INTERNODE_CACHE_BYTES=64 CONFIG_X86_CMPXCHG=y CONFIG_X86_L1_CACHE_SHIFT=6 CONFIG_X86_GOOD_APIC=y CONFIG_X86_INTEL_USERCOPY=y CONFIG_X86_USE_PPRO_CHECKSUM=y CONFIG_X86_TSC=y CONFIG_X86_MINIMUM_CPU_FAMILY=64 CONFIG_HPET_TIMER=y CONFIG_GART_IOMMU=y # CONFIG_CALGARY_IOMMU is not set CONFIG_SWIOTLB=y CONFIG_NR_CPUS=2 # CONFIG_SCHED_SMT is not set CONFIG_SCHED_MC=y # CONFIG_PREEMPT_NONE is not set # CONFIG_PREEMPT_VOLUNTARY is not set CONFIG_PREEMPT=y CONFIG_PREEMPT_BKL=y CONFIG_X86_LOCAL_APIC=y CONFIG_X86_IO_APIC=y CONFIG_X86_MCE=y # CONFIG_X86_MCE_INTEL is not set CONFIG_X86_MCE_AMD=y # CONFIG_MICROCODE is not set CONFIG_X86_MSR=y CONFIG_X86_CPUID=y # CONFIG_NUMA is not set CONFIG_ARCH_FLATMEM_ENABLE=y CONFIG_ARCH_SPARSEMEM_ENABLE=y CONFIG_SELECT_MEMORY_MODEL=y CONFIG_FLATMEM_MANUAL=y # CONFIG_DISCONTIGMEM_MANUAL is not set # CONFIG_SPARSEMEM_MANUAL is not set CONFIG_FLATMEM=y CONFIG_FLAT_NODE_MEM_MAP=y # CONFIG_SPARSEMEM_STATIC is not set CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y CONFIG_SPLIT_PTLOCK_CPUS=4 CONFIG_RESOURCES_64BIT=y CONFIG_ZONE_DMA_FLAG=1 CONFIG_BOUNCE=y CONFIG_VIRT_TO_BUS=y CONFIG_MTRR=y # CONFIG_SECCOMP is not set # CONFIG_CC_STACKPROTECTOR is not set # CONFIG_HZ_100 is not set # CONFIG_HZ_250 is not set # CONFIG_HZ_300 is not set CONFIG_HZ_1000=y CONFIG_HZ=1000 # CONFIG_KEXEC is not set # CONFIG_CRASH_DUMP is not set CONFIG_PHYSICAL_START=0x200000 # CONFIG_RELOCATABLE is not set CONFIG_PHYSICAL_ALIGN=0x200000 # CONFIG_HOTPLUG_CPU is not set CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y # # Power management options # CONFIG_PM=y # CONFIG_PM_LEGACY is not set # CONFIG_PM_DEBUG is not set CONFIG_SUSPEND_SMP_POSSIBLE=y # CONFIG_SUSPEND is not set CONFIG_HIBERNATION_SMP_POSSIBLE=y # CONFIG_HIBERNATION is not set CONFIG_ACPI=y # CONFIG_ACPI_PROCFS is not set # CONFIG_ACPI_PROCFS_POWER is not set CONFIG_ACPI_SYSFS_POWER=y # CONFIG_ACPI_PROC_EVENT is not set # CONFIG_ACPI_AC is not set # CONFIG_ACPI_BATTERY is not set CONFIG_ACPI_BUTTON=m # CONFIG_ACPI_VIDEO is not set CONFIG_ACPI_FAN=m # CONFIG_ACPI_DOCK is not set CONFIG_ACPI_PROCESSOR=m CONFIG_ACPI_THERMAL=m # CONFIG_ACPI_ASUS is not set # CONFIG_ACPI_TOSHIBA is not set CONFIG_ACPI_BLACKLIST_YEAR=0 # CONFIG_ACPI_DEBUG is not set CONFIG_ACPI_EC=y CONFIG_ACPI_POWER=y CONFIG_ACPI_SYSTEM=y CONFIG_X86_PM_TIMER=y # CONFIG_ACPI_CONTAINER is not set # CONFIG_ACPI_SBS is not set # # CPU Frequency scaling # CONFIG_CPU_FREQ=y CONFIG_CPU_FREQ_TABLE=m # CONFIG_CPU_FREQ_DEBUG is not set CONFIG_CPU_FREQ_STAT=m CONFIG_CPU_FREQ_STAT_DETAILS=y CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y # CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set # CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set # CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set CONFIG_CPU_FREQ_GOV_PERFORMANCE=y CONFIG_CPU_FREQ_GOV_POWERSAVE=m CONFIG_CPU_FREQ_GOV_USERSPACE=m CONFIG_CPU_FREQ_GOV_ONDEMAND=m CONFIG_CPU_FREQ_GOV_CONSERVATIVE=m # # CPUFreq processor drivers # CONFIG_X86_ACPI_CPUFREQ=m CONFIG_X86_POWERNOW_K8=m CONFIG_X86_POWERNOW_K8_ACPI=y # CONFIG_X86_SPEEDSTEP_CENTRINO is not set # CONFIG_X86_P4_CLOCKMOD is not set # # shared options # CONFIG_X86_ACPI_CPUFREQ_PROC_INTF=y # CONFIG_X86_SPEEDSTEP_LIB is not set # CONFIG_CPU_IDLE is not set # # Bus options (PCI etc.) # CONFIG_PCI=y CONFIG_PCI_DIRECT=y CONFIG_PCI_MMCONFIG=y CONFIG_PCI_DOMAINS=y # CONFIG_DMAR is not set CONFIG_PCIEPORTBUS=y CONFIG_PCIEAER=y CONFIG_ARCH_SUPPORTS_MSI=y CONFIG_PCI_MSI=y # CONFIG_PCI_LEGACY is not set # CONFIG_PCI_DEBUG is not set CONFIG_HT_IRQ=y CONFIG_ISA_DMA_API=y CONFIG_K8_NB=y # CONFIG_PCCARD is not set # CONFIG_HOTPLUG_PCI is not set # # Executable file formats / Emulations # CONFIG_BINFMT_ELF=y CONFIG_BINFMT_MISC=m CONFIG_IA32_EMULATION=y # CONFIG_IA32_AOUT is not set CONFIG_COMPAT=y CONFIG_COMPAT_FOR_U64_ALIGNMENT=y CONFIG_SYSVIPC_COMPAT=y # # Networking # CONFIG_NET=y # # Networking options # CONFIG_PACKET=m CONFIG_PACKET_MMAP=y CONFIG_UNIX=m CONFIG_XFRM=y CONFIG_XFRM_USER=m # CONFIG_XFRM_SUB_POLICY is not set # CONFIG_XFRM_MIGRATE is not set CONFIG_NET_KEY=m # CONFIG_NET_KEY_MIGRATE is not set CONFIG_INET=y CONFIG_IP_MULTICAST=y CONFIG_IP_ADVANCED_ROUTER=y CONFIG_ASK_IP_FIB_HASH=y # CONFIG_IP_FIB_TRIE is not set CONFIG_IP_FIB_HASH=y CONFIG_IP_MULTIPLE_TABLES=y CONFIG_IP_ROUTE_MULTIPATH=y # CONFIG_IP_ROUTE_VERBOSE is not set # CONFIG_IP_PNP is not set # CONFIG_NET_IPIP is not set # CONFIG_NET_IPGRE is not set # CONFIG_IP_MROUTE is not set # CONFIG_ARPD is not set CONFIG_SYN_COOKIES=y CONFIG_INET_AH=m CONFIG_INET_ESP=m CONFIG_INET_IPCOMP=m CONFIG_INET_XFRM_TUNNEL=m CONFIG_INET_TUNNEL=m CONFIG_INET_XFRM_MODE_TRANSPORT=m CONFIG_INET_XFRM_MODE_TUNNEL=m CONFIG_INET_XFRM_MODE_BEET=m CONFIG_INET_LRO=y CONFIG_INET_DIAG=m CONFIG_INET_TCP_DIAG=m # CONFIG_TCP_CONG_ADVANCED is not set CONFIG_TCP_CONG_CUBIC=y CONFIG_DEFAULT_TCP_CONG="cubic" # CONFIG_TCP_MD5SIG is not set # CONFIG_IP_VS is not set CONFIG_IPV6=m CONFIG_IPV6_PRIVACY=y CONFIG_IPV6_ROUTER_PREF=y # CONFIG_IPV6_ROUTE_INFO is not set # CONFIG_IPV6_OPTIMISTIC_DAD is not set CONFIG_INET6_AH=m CONFIG_INET6_ESP=m CONFIG_INET6_IPCOMP=m # CONFIG_IPV6_MIP6 is not set CONFIG_INET6_XFRM_TUNNEL=m CONFIG_INET6_TUNNEL=m CONFIG_INET6_XFRM_MODE_TRANSPORT=m CONFIG_INET6_XFRM_MODE_TUNNEL=m CONFIG_INET6_XFRM_MODE_BEET=m # CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION is not set CONFIG_IPV6_SIT=m # CONFIG_IPV6_TUNNEL is not set # CONFIG_IPV6_MULTIPLE_TABLES is not set # CONFIG_NETLABEL is not set # CONFIG_NETWORK_SECMARK is not set CONFIG_NETFILTER=y # CONFIG_NETFILTER_DEBUG is not set # CONFIG_BRIDGE_NETFILTER is not set # # Core Netfilter Configuration # CONFIG_NETFILTER_NETLINK=m CONFIG_NETFILTER_NETLINK_QUEUE=m CONFIG_NETFILTER_NETLINK_LOG=m CONFIG_NF_CONNTRACK_ENABLED=m CONFIG_NF_CONNTRACK=m CONFIG_NF_CT_ACCT=y CONFIG_NF_CONNTRACK_MARK=y # CONFIG_NF_CONNTRACK_EVENTS is not set CONFIG_NF_CT_PROTO_SCTP=m # CONFIG_NF_CT_PROTO_UDPLITE is not set # CONFIG_NF_CONNTRACK_AMANDA is not set CONFIG_NF_CONNTRACK_FTP=m # CONFIG_NF_CONNTRACK_H323 is not set CONFIG_NF_CONNTRACK_IRC=m # CONFIG_NF_CONNTRACK_NETBIOS_NS is not set # CONFIG_NF_CONNTRACK_PPTP is not set # CONFIG_NF_CONNTRACK_SANE is not set CONFIG_NF_CONNTRACK_SIP=m CONFIG_NF_CONNTRACK_TFTP=m # CONFIG_NF_CT_NETLINK is not set CONFIG_NETFILTER_XTABLES=m CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m CONFIG_NETFILTER_XT_TARGET_CONNMARK=m CONFIG_NETFILTER_XT_TARGET_DSCP=m CONFIG_NETFILTER_XT_TARGET_MARK=m CONFIG_NETFILTER_XT_TARGET_NFQUEUE=m CONFIG_NETFILTER_XT_TARGET_NFLOG=m CONFIG_NETFILTER_XT_TARGET_NOTRACK=m CONFIG_NETFILTER_XT_TARGET_TRACE=m CONFIG_NETFILTER_XT_TARGET_TCPMSS=m CONFIG_NETFILTER_XT_MATCH_COMMENT=m CONFIG_NETFILTER_XT_MATCH_CONNBYTES=m CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=m CONFIG_NETFILTER_XT_MATCH_CONNMARK=m CONFIG_NETFILTER_XT_MATCH_CONNTRACK=m CONFIG_NETFILTER_XT_MATCH_DCCP=m CONFIG_NETFILTER_XT_MATCH_DSCP=m CONFIG_NETFILTER_XT_MATCH_ESP=m CONFIG_NETFILTER_XT_MATCH_HELPER=m CONFIG_NETFILTER_XT_MATCH_LENGTH=m CONFIG_NETFILTER_XT_MATCH_LIMIT=m CONFIG_NETFILTER_XT_MATCH_MAC=m CONFIG_NETFILTER_XT_MATCH_MARK=m CONFIG_NETFILTER_XT_MATCH_POLICY=m CONFIG_NETFILTER_XT_MATCH_MULTIPORT=m CONFIG_NETFILTER_XT_MATCH_PKTTYPE=m CONFIG_NETFILTER_XT_MATCH_QUOTA=m CONFIG_NETFILTER_XT_MATCH_REALM=m CONFIG_NETFILTER_XT_MATCH_SCTP=m CONFIG_NETFILTER_XT_MATCH_STATE=m CONFIG_NETFILTER_XT_MATCH_STATISTIC=m CONFIG_NETFILTER_XT_MATCH_STRING=m CONFIG_NETFILTER_XT_MATCH_TCPMSS=m CONFIG_NETFILTER_XT_MATCH_TIME=m CONFIG_NETFILTER_XT_MATCH_U32=m CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=m # # IP: Netfilter Configuration # CONFIG_NF_CONNTRACK_IPV4=m CONFIG_NF_CONNTRACK_PROC_COMPAT=y # CONFIG_IP_NF_QUEUE is not set CONFIG_IP_NF_IPTABLES=m CONFIG_IP_NF_MATCH_IPRANGE=m CONFIG_IP_NF_MATCH_TOS=m CONFIG_IP_NF_MATCH_RECENT=m CONFIG_IP_NF_MATCH_ECN=m CONFIG_IP_NF_MATCH_AH=m CONFIG_IP_NF_MATCH_TTL=m CONFIG_IP_NF_MATCH_OWNER=m CONFIG_IP_NF_MATCH_ADDRTYPE=m CONFIG_IP_NF_FILTER=m CONFIG_IP_NF_TARGET_REJECT=m CONFIG_IP_NF_TARGET_LOG=m CONFIG_IP_NF_TARGET_ULOG=m CONFIG_NF_NAT=m CONFIG_NF_NAT_NEEDED=y CONFIG_IP_NF_TARGET_MASQUERADE=m CONFIG_IP_NF_TARGET_REDIRECT=m CONFIG_IP_NF_TARGET_NETMAP=m CONFIG_IP_NF_TARGET_SAME=m CONFIG_NF_NAT_SNMP_BASIC=m CONFIG_NF_NAT_FTP=m CONFIG_NF_NAT_IRC=m CONFIG_NF_NAT_TFTP=m # CONFIG_NF_NAT_AMANDA is not set # CONFIG_NF_NAT_PPTP is not set # CONFIG_NF_NAT_H323 is not set CONFIG_NF_NAT_SIP=m CONFIG_IP_NF_MANGLE=m CONFIG_IP_NF_TARGET_TOS=m CONFIG_IP_NF_TARGET_ECN=m CONFIG_IP_NF_TARGET_TTL=m CONFIG_IP_NF_TARGET_CLUSTERIP=m CONFIG_IP_NF_RAW=m CONFIG_IP_NF_ARPTABLES=m CONFIG_IP_NF_ARPFILTER=m CONFIG_IP_NF_ARP_MANGLE=m # # IPv6: Netfilter Configuration (EXPERIMENTAL) # CONFIG_NF_CONNTRACK_IPV6=m CONFIG_IP6_NF_QUEUE=m CONFIG_IP6_NF_IPTABLES=m CONFIG_IP6_NF_MATCH_RT=m CONFIG_IP6_NF_MATCH_OPTS=m CONFIG_IP6_NF_MATCH_FRAG=m CONFIG_IP6_NF_MATCH_HL=m CONFIG_IP6_NF_MATCH_OWNER=m CONFIG_IP6_NF_MATCH_IPV6HEADER=m CONFIG_IP6_NF_MATCH_AH=m CONFIG_IP6_NF_MATCH_MH=m CONFIG_IP6_NF_MATCH_EUI64=m CONFIG_IP6_NF_FILTER=m CONFIG_IP6_NF_TARGET_LOG=m CONFIG_IP6_NF_TARGET_REJECT=m CONFIG_IP6_NF_MANGLE=m CONFIG_IP6_NF_TARGET_HL=m CONFIG_IP6_NF_RAW=m # # Bridge: Netfilter Configuration # # CONFIG_BRIDGE_NF_EBTABLES is not set # CONFIG_IP_DCCP is not set CONFIG_IP_SCTP=m # CONFIG_SCTP_DBG_MSG is not set # CONFIG_SCTP_DBG_OBJCNT is not set # CONFIG_SCTP_HMAC_NONE is not set # CONFIG_SCTP_HMAC_SHA1 is not set CONFIG_SCTP_HMAC_MD5=y # CONFIG_TIPC is not set CONFIG_ATM=m CONFIG_ATM_CLIP=m CONFIG_ATM_CLIP_NO_ICMP=y CONFIG_ATM_LANE=m CONFIG_ATM_MPOA=m CONFIG_ATM_BR2684=m CONFIG_ATM_BR2684_IPFILTER=y CONFIG_BRIDGE=m # CONFIG_VLAN_8021Q is not set # CONFIG_DECNET is not set CONFIG_LLC=m # CONFIG_LLC2 is not set # CONFIG_IPX is not set # CONFIG_ATALK is not set # CONFIG_X25 is not set # CONFIG_LAPB is not set # CONFIG_ECONET is not set # CONFIG_WAN_ROUTER is not set CONFIG_NET_SCHED=y # # Queueing/Scheduling # CONFIG_NET_SCH_CBQ=m CONFIG_NET_SCH_HTB=m CONFIG_NET_SCH_HFSC=m CONFIG_NET_SCH_ATM=m CONFIG_NET_SCH_PRIO=m CONFIG_NET_SCH_RR=m CONFIG_NET_SCH_RED=m CONFIG_NET_SCH_SFQ=m CONFIG_NET_SCH_TEQL=m CONFIG_NET_SCH_TBF=m CONFIG_NET_SCH_GRED=m CONFIG_NET_SCH_DSMARK=m CONFIG_NET_SCH_NETEM=m CONFIG_NET_SCH_INGRESS=m # # Classification # CONFIG_NET_CLS=y CONFIG_NET_CLS_BASIC=m CONFIG_NET_CLS_TCINDEX=m CONFIG_NET_CLS_ROUTE4=m CONFIG_NET_CLS_ROUTE=y CONFIG_NET_CLS_FW=m CONFIG_NET_CLS_U32=m CONFIG_CLS_U32_PERF=y CONFIG_CLS_U32_MARK=y CONFIG_NET_CLS_RSVP=m CONFIG_NET_CLS_RSVP6=m CONFIG_NET_EMATCH=y CONFIG_NET_EMATCH_STACK=32 CONFIG_NET_EMATCH_CMP=m CONFIG_NET_EMATCH_NBYTE=m CONFIG_NET_EMATCH_U32=m CONFIG_NET_EMATCH_META=m CONFIG_NET_EMATCH_TEXT=m CONFIG_NET_CLS_ACT=y CONFIG_NET_ACT_POLICE=m CONFIG_NET_ACT_GACT=m CONFIG_GACT_PROB=y CONFIG_NET_ACT_MIRRED=m CONFIG_NET_ACT_IPT=m CONFIG_NET_ACT_NAT=m CONFIG_NET_ACT_PEDIT=m CONFIG_NET_ACT_SIMP=m # CONFIG_NET_CLS_POLICE is not set CONFIG_NET_CLS_IND=y CONFIG_NET_SCH_FIFO=y # # Network testing # # CONFIG_NET_PKTGEN is not set # CONFIG_HAMRADIO is not set # CONFIG_IRDA is not set CONFIG_BT=m CONFIG_BT_L2CAP=m CONFIG_BT_SCO=m CONFIG_BT_RFCOMM=m CONFIG_BT_RFCOMM_TTY=y CONFIG_BT_BNEP=m CONFIG_BT_BNEP_MC_FILTER=y CONFIG_BT_BNEP_PROTO_FILTER=y CONFIG_BT_HIDP=m # # Bluetooth device drivers # CONFIG_BT_HCIUSB=m CONFIG_BT_HCIUSB_SCO=y CONFIG_BT_HCIUART=m CONFIG_BT_HCIUART_H4=y CONFIG_BT_HCIUART_BCSP=y # CONFIG_BT_HCIUART_LL is not set CONFIG_BT_HCIBCM203X=m CONFIG_BT_HCIBPA10X=m CONFIG_BT_HCIBFUSB=m CONFIG_BT_HCIVHCI=m # CONFIG_AF_RXRPC is not set CONFIG_FIB_RULES=y # # Wireless # CONFIG_CFG80211=m CONFIG_NL80211=y CONFIG_WIRELESS_EXT=y CONFIG_MAC80211=m CONFIG_MAC80211_RCSIMPLE=y CONFIG_MAC80211_LEDS=y # CONFIG_MAC80211_DEBUGFS is not set # CONFIG_MAC80211_DEBUG is not set CONFIG_IEEE80211=y # CONFIG_IEEE80211_DEBUG is not set CONFIG_IEEE80211_CRYPT_WEP=m CONFIG_IEEE80211_CRYPT_CCMP=m CONFIG_IEEE80211_CRYPT_TKIP=m CONFIG_IEEE80211_SOFTMAC=m # CONFIG_IEEE80211_SOFTMAC_DEBUG is not set CONFIG_RFKILL=m CONFIG_RFKILL_INPUT=m CONFIG_RFKILL_LEDS=y CONFIG_NET_9P=m CONFIG_NET_9P_FD=m # CONFIG_NET_9P_DEBUG is not set # # Device Drivers # # # Generic Driver Options # CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug" CONFIG_STANDALONE=y CONFIG_PREVENT_FIRMWARE_BUILD=y CONFIG_FW_LOADER=y # CONFIG_DEBUG_DRIVER is not set # CONFIG_DEBUG_DEVRES is not set # CONFIG_SYS_HYPERVISOR is not set CONFIG_CONNECTOR=m # CONFIG_MTD is not set CONFIG_PARPORT=m CONFIG_PARPORT_PC=m CONFIG_PARPORT_SERIAL=m CONFIG_PARPORT_PC_FIFO=y CONFIG_PARPORT_PC_SUPERIO=y # CONFIG_PARPORT_GSC is not set # CONFIG_PARPORT_AX88796 is not set CONFIG_PARPORT_1284=y CONFIG_PNP=y # CONFIG_PNP_DEBUG is not set # # Protocols # CONFIG_PNPACPI=y CONFIG_BLK_DEV=y CONFIG_BLK_DEV_FD=m # CONFIG_PARIDE is not set # CONFIG_BLK_CPQ_DA is not set # CONFIG_BLK_CPQ_CISS_DA is not set # CONFIG_BLK_DEV_DAC960 is not set # CONFIG_BLK_DEV_UMEM is not set # CONFIG_BLK_DEV_COW_COMMON is not set CONFIG_BLK_DEV_LOOP=m CONFIG_BLK_DEV_CRYPTOLOOP=m # CONFIG_BLK_DEV_NBD is not set # CONFIG_BLK_DEV_SX8 is not set # CONFIG_BLK_DEV_UB is not set CONFIG_BLK_DEV_RAM=y CONFIG_BLK_DEV_RAM_COUNT=16 CONFIG_BLK_DEV_RAM_SIZE=8192 CONFIG_BLK_DEV_RAM_BLOCKSIZE=1024 CONFIG_CDROM_PKTCDVD=m CONFIG_CDROM_PKTCDVD_BUFFERS=8 CONFIG_CDROM_PKTCDVD_WCACHE=y # CONFIG_ATA_OVER_ETH is not set # CONFIG_MISC_DEVICES is not set CONFIG_EEPROM_93CX6=m # CONFIG_IDE is not set # # SCSI device support # # CONFIG_RAID_ATTRS is not set CONFIG_SCSI=y CONFIG_SCSI_DMA=y # CONFIG_SCSI_TGT is not set # CONFIG_SCSI_NETLINK is not set # CONFIG_SCSI_PROC_FS is not set # # SCSI support type (disk, tape, CD-ROM) # CONFIG_BLK_DEV_SD=y # CONFIG_CHR_DEV_ST is not set # CONFIG_CHR_DEV_OSST is not set CONFIG_BLK_DEV_SR=m CONFIG_BLK_DEV_SR_VENDOR=y CONFIG_CHR_DEV_SG=m # CONFIG_CHR_DEV_SCH is not set # # Some SCSI devices (e.g. CD jukebox) support multiple LUNs # # CONFIG_SCSI_MULTI_LUN is not set # CONFIG_SCSI_CONSTANTS is not set # CONFIG_SCSI_LOGGING is not set # CONFIG_SCSI_SCAN_ASYNC is not set CONFIG_SCSI_WAIT_SCAN=m # # SCSI Transports # # CONFIG_SCSI_SPI_ATTRS is not set # CONFIG_SCSI_FC_ATTRS is not set # CONFIG_SCSI_ISCSI_ATTRS is not set # CONFIG_SCSI_SAS_ATTRS is not set # CONFIG_SCSI_SAS_LIBSAS is not set # CONFIG_SCSI_SRP_ATTRS is not set # CONFIG_SCSI_LOWLEVEL is not set CONFIG_ATA=y # CONFIG_ATA_NONSTANDARD is not set CONFIG_ATA_ACPI=y CONFIG_SATA_AHCI=y # CONFIG_SATA_SVW is not set # CONFIG_ATA_PIIX is not set # CONFIG_SATA_MV is not set # CONFIG_SATA_NV is not set # CONFIG_PDC_ADMA is not set # CONFIG_SATA_QSTOR is not set # CONFIG_SATA_PROMISE is not set # CONFIG_SATA_SX4 is not set # CONFIG_SATA_SIL is not set CONFIG_SATA_SIL24=m # CONFIG_SATA_SIS is not set CONFIG_SATA_ULI=m CONFIG_SATA_VIA=m # CONFIG_SATA_VITESSE is not set # CONFIG_SATA_INIC162X is not set CONFIG_PATA_ACPI=m CONFIG_PATA_ALI=y # CONFIG_PATA_AMD is not set # CONFIG_PATA_ARTOP is not set # CONFIG_PATA_ATIIXP is not set # CONFIG_PATA_CMD640_PCI is not set # CONFIG_PATA_CMD64X is not set # CONFIG_PATA_CS5520 is not set # CONFIG_PATA_CS5530 is not set # CONFIG_PATA_CYPRESS is not set # CONFIG_PATA_EFAR is not set CONFIG_ATA_GENERIC=m # CONFIG_PATA_HPT366 is not set # CONFIG_PATA_HPT37X is not set # CONFIG_PATA_HPT3X2N is not set # CONFIG_PATA_HPT3X3 is not set # CONFIG_PATA_IT821X is not set # CONFIG_PATA_IT8213 is not set CONFIG_PATA_JMICRON=m # CONFIG_PATA_TRIFLEX is not set # CONFIG_PATA_MARVELL is not set # CONFIG_PATA_MPIIX is not set # CONFIG_PATA_OLDPIIX is not set CONFIG_PATA_NETCELL=m # CONFIG_PATA_NS87410 is not set # CONFIG_PATA_NS87415 is not set # CONFIG_PATA_OPTI is not set # CONFIG_PATA_OPTIDMA is not set # CONFIG_PATA_PDC_OLD is not set # CONFIG_PATA_RADISYS is not set # CONFIG_PATA_RZ1000 is not set # CONFIG_PATA_SC1200 is not set # CONFIG_PATA_SERVERWORKS is not set # CONFIG_PATA_PDC2027X is not set # CONFIG_PATA_SIL680 is not set # CONFIG_PATA_SIS is not set CONFIG_PATA_VIA=m # CONFIG_PATA_WINBOND is not set # CONFIG_MD is not set # CONFIG_FUSION is not set # # IEEE 1394 (FireWire) support # CONFIG_FIREWIRE=m CONFIG_FIREWIRE_OHCI=m CONFIG_FIREWIRE_SBP2=m # CONFIG_IEEE1394 is not set # CONFIG_I2O is not set # CONFIG_MACINTOSH_DRIVERS is not set CONFIG_NETDEVICES=y CONFIG_NETDEVICES_MULTIQUEUE=y # CONFIG_IFB is not set CONFIG_DUMMY=m CONFIG_BONDING=m # CONFIG_MACVLAN is not set # CONFIG_EQUALIZER is not set CONFIG_TUN=m CONFIG_VETH=m # CONFIG_NET_SB1000 is not set # CONFIG_ARCNET is not set CONFIG_PHYLIB=m # # MII PHY device drivers # CONFIG_MARVELL_PHY=m CONFIG_DAVICOM_PHY=m CONFIG_QSEMI_PHY=m CONFIG_LXT_PHY=m CONFIG_CICADA_PHY=m CONFIG_VITESSE_PHY=m CONFIG_SMSC_PHY=m CONFIG_BROADCOM_PHY=m CONFIG_ICPLUS_PHY=m CONFIG_FIXED_PHY=m CONFIG_FIXED_MII_10_FDX=y CONFIG_FIXED_MII_100_FDX=y CONFIG_FIXED_MII_1000_FDX=y CONFIG_FIXED_MII_AMNT=1 # CONFIG_MDIO_BITBANG is not set CONFIG_NET_ETHERNET=y CONFIG_MII=m # CONFIG_HAPPYMEAL is not set # CONFIG_SUNGEM is not set # CONFIG_CASSINI is not set # CONFIG_NET_VENDOR_3COM is not set CONFIG_NET_TULIP=y # CONFIG_DE2104X is not set # CONFIG_TULIP is not set # CONFIG_DE4X5 is not set # CONFIG_WINBOND_840 is not set # CONFIG_DM9102 is not set CONFIG_ULI526X=m # CONFIG_HP100 is not set # CONFIG_IBM_NEW_EMAC_ZMII is not set # CONFIG_IBM_NEW_EMAC_RGMII is not set # CONFIG_IBM_NEW_EMAC_TAH is not set # CONFIG_IBM_NEW_EMAC_EMAC4 is not set # CONFIG_NET_PCI is not set # CONFIG_B44 is not set # CONFIG_NET_POCKET is not set CONFIG_NETDEV_1000=y # CONFIG_ACENIC is not set # CONFIG_DL2K is not set # CONFIG_E1000 is not set # CONFIG_E1000E is not set # CONFIG_IP1000 is not set # CONFIG_NS83820 is not set # CONFIG_HAMACHI is not set # CONFIG_YELLOWFIN is not set CONFIG_R8169=m CONFIG_R8169_NAPI=y # CONFIG_SIS190 is not set # CONFIG_SKGE is not set # CONFIG_SKY2 is not set # CONFIG_SK98LIN is not set # CONFIG_VIA_VELOCITY is not set # CONFIG_TIGON3 is not set # CONFIG_BNX2 is not set # CONFIG_QLA3XXX is not set # CONFIG_ATL1 is not set # CONFIG_NETDEV_10000 is not set # CONFIG_TR is not set # # Wireless LAN # # CONFIG_WLAN_PRE80211 is not set CONFIG_WLAN_80211=y # CONFIG_IPW2100 is not set # CONFIG_IPW2200 is not set # CONFIG_LIBERTAS is not set # CONFIG_AIRO is not set # CONFIG_HERMES is not set # CONFIG_ATMEL is not set # CONFIG_PRISM54 is not set CONFIG_USB_ZD1201=m CONFIG_RTL8187=m # CONFIG_ADM8211 is not set # CONFIG_P54_COMMON is not set # CONFIG_IWLWIFI is not set # CONFIG_HOSTAP is not set # CONFIG_BCM43XX is not set # CONFIG_B43 is not set # CONFIG_B43LEGACY is not set CONFIG_ZD1211RW=m # CONFIG_ZD1211RW_DEBUG is not set CONFIG_RT2X00=m CONFIG_RT2X00_LIB=m CONFIG_RT2X00_LIB_PCI=m CONFIG_RT2X00_LIB_USB=m CONFIG_RT2X00_LIB_FIRMWARE=y CONFIG_RT2X00_LIB_RFKILL=y # CONFIG_RT2400PCI is not set CONFIG_RT2500PCI=m CONFIG_RT2500PCI_RFKILL=y # CONFIG_RT61PCI is not set CONFIG_RT2500USB=m CONFIG_RT73USB=m # CONFIG_RT2X00_DEBUG is not set # # USB Network Adapters # # CONFIG_USB_CATC is not set # CONFIG_USB_KAWETH is not set # CONFIG_USB_PEGASUS is not set # CONFIG_USB_RTL8150 is not set # CONFIG_USB_USBNET is not set # CONFIG_WAN is not set # CONFIG_ATM_DRIVERS is not set # CONFIG_FDDI is not set # CONFIG_HIPPI is not set # CONFIG_PLIP is not set CONFIG_PPP=m CONFIG_PPP_MULTILINK=y CONFIG_PPP_FILTER=y CONFIG_PPP_ASYNC=m CONFIG_PPP_SYNC_TTY=m CONFIG_PPP_DEFLATE=m CONFIG_PPP_BSDCOMP=m CONFIG_PPP_MPPE=m CONFIG_PPPOE=m CONFIG_PPPOATM=m # CONFIG_PPPOL2TP is not set # CONFIG_SLIP is not set CONFIG_SLHC=m # CONFIG_NET_FC is not set # CONFIG_SHAPER is not set CONFIG_NETCONSOLE=m CONFIG_NETCONSOLE_DYNAMIC=y CONFIG_NETPOLL=y # CONFIG_NETPOLL_TRAP is not set CONFIG_NET_POLL_CONTROLLER=y # CONFIG_ISDN is not set # CONFIG_PHONE is not set # # Input device support # CONFIG_INPUT=y CONFIG_INPUT_FF_MEMLESS=m CONFIG_INPUT_POLLDEV=m # # Userland interfaces # CONFIG_INPUT_MOUSEDEV=y CONFIG_INPUT_MOUSEDEV_PSAUX=y CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024 CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768 CONFIG_INPUT_JOYDEV=m CONFIG_INPUT_EVDEV=m CONFIG_INPUT_EVBUG=m # # Input Device Drivers # CONFIG_INPUT_KEYBOARD=y CONFIG_KEYBOARD_ATKBD=y # CONFIG_KEYBOARD_SUNKBD is not set # CONFIG_KEYBOARD_LKKBD is not set CONFIG_KEYBOARD_XTKBD=m # CONFIG_KEYBOARD_NEWTON is not set # CONFIG_KEYBOARD_STOWAWAY is not set CONFIG_INPUT_MOUSE=y CONFIG_MOUSE_PS2=y CONFIG_MOUSE_PS2_ALPS=y CONFIG_MOUSE_PS2_LOGIPS2PP=y CONFIG_MOUSE_PS2_SYNAPTICS=y CONFIG_MOUSE_PS2_LIFEBOOK=y CONFIG_MOUSE_PS2_TRACKPOINT=y # CONFIG_MOUSE_PS2_TOUCHKIT is not set # CONFIG_MOUSE_SERIAL is not set # CONFIG_MOUSE_APPLETOUCH is not set # CONFIG_MOUSE_VSXXXAA is not set CONFIG_INPUT_JOYSTICK=y CONFIG_JOYSTICK_ANALOG=m CONFIG_JOYSTICK_A3D=m CONFIG_JOYSTICK_ADI=m CONFIG_JOYSTICK_COBRA=m CONFIG_JOYSTICK_GF2K=m CONFIG_JOYSTICK_GRIP=m CONFIG_JOYSTICK_GRIP_MP=m CONFIG_JOYSTICK_GUILLEMOT=m CONFIG_JOYSTICK_INTERACT=m CONFIG_JOYSTICK_SIDEWINDER=m CONFIG_JOYSTICK_TMDC=m CONFIG_JOYSTICK_IFORCE=m CONFIG_JOYSTICK_IFORCE_USB=y CONFIG_JOYSTICK_IFORCE_232=y CONFIG_JOYSTICK_WARRIOR=m CONFIG_JOYSTICK_MAGELLAN=m CONFIG_JOYSTICK_SPACEORB=m CONFIG_JOYSTICK_SPACEBALL=m CONFIG_JOYSTICK_STINGER=m CONFIG_JOYSTICK_TWIDJOY=m CONFIG_JOYSTICK_DB9=m CONFIG_JOYSTICK_GAMECON=m CONFIG_JOYSTICK_TURBOGRAFX=m CONFIG_JOYSTICK_JOYDUMP=m CONFIG_JOYSTICK_XPAD=m CONFIG_JOYSTICK_XPAD_FF=y CONFIG_JOYSTICK_XPAD_LEDS=y # CONFIG_INPUT_TABLET is not set # CONFIG_INPUT_TOUCHSCREEN is not set CONFIG_INPUT_MISC=y CONFIG_INPUT_PCSPKR=m # CONFIG_INPUT_ATLAS_BTNS is not set # CONFIG_INPUT_ATI_REMOTE is not set # CONFIG_INPUT_ATI_REMOTE2 is not set # CONFIG_INPUT_KEYSPAN_REMOTE is not set # CONFIG_INPUT_POWERMATE is not set # CONFIG_INPUT_YEALINK is not set CONFIG_INPUT_UINPUT=m # # Hardware I/O ports # CONFIG_SERIO=y CONFIG_SERIO_I8042=y CONFIG_SERIO_SERPORT=m # CONFIG_SERIO_CT82C710 is not set # CONFIG_SERIO_PARKBD is not set CONFIG_SERIO_PCIPS2=m CONFIG_SERIO_LIBPS2=y CONFIG_SERIO_RAW=m CONFIG_GAMEPORT=m CONFIG_GAMEPORT_NS558=m # CONFIG_GAMEPORT_L4 is not set CONFIG_GAMEPORT_EMU10K1=m # CONFIG_GAMEPORT_FM801 is not set # # Character devices # CONFIG_VT=y CONFIG_VT_CONSOLE=y CONFIG_HW_CONSOLE=y CONFIG_VT_HW_CONSOLE_BINDING=y # CONFIG_SERIAL_NONSTANDARD is not set # # Serial drivers # CONFIG_SERIAL_8250=m CONFIG_FIX_EARLYCON_MEM=y CONFIG_SERIAL_8250_PCI=m CONFIG_SERIAL_8250_PNP=m CONFIG_SERIAL_8250_NR_UARTS=4 CONFIG_SERIAL_8250_RUNTIME_UARTS=4 CONFIG_SERIAL_8250_EXTENDED=y CONFIG_SERIAL_8250_MANY_PORTS=y CONFIG_SERIAL_8250_SHARE_IRQ=y # CONFIG_SERIAL_8250_DETECT_IRQ is not set CONFIG_SERIAL_8250_RSA=y # # Non-8250 serial port support # CONFIG_SERIAL_CORE=m # CONFIG_SERIAL_JSM is not set CONFIG_UNIX98_PTYS=y # CONFIG_LEGACY_PTYS is not set CONFIG_PRINTER=m # CONFIG_LP_CONSOLE is not set # CONFIG_PPDEV is not set # CONFIG_IPMI_HANDLER is not set CONFIG_HW_RANDOM=m CONFIG_HW_RANDOM_INTEL=m CONFIG_HW_RANDOM_AMD=m CONFIG_NVRAM=m CONFIG_RTC=m CONFIG_GEN_RTC=m CONFIG_GEN_RTC_X=y # CONFIG_R3964 is not set # CONFIG_APPLICOM is not set # CONFIG_MWAVE is not set # CONFIG_PC8736x_GPIO is not set # CONFIG_RAW_DRIVER is not set CONFIG_HPET=y CONFIG_HPET_RTC_IRQ=y CONFIG_HPET_MMAP=y CONFIG_HANGCHECK_TIMER=m # CONFIG_TCG_TPM is not set # CONFIG_TELCLOCK is not set CONFIG_DEVPORT=y CONFIG_I2C=m CONFIG_I2C_BOARDINFO=y CONFIG_I2C_CHARDEV=m # # I2C Algorithms # CONFIG_I2C_ALGOBIT=m CONFIG_I2C_ALGOPCF=m CONFIG_I2C_ALGOPCA=m # # I2C Hardware Bus support # CONFIG_I2C_ALI1535=m CONFIG_I2C_ALI1563=m CONFIG_I2C_ALI15X3=m # CONFIG_I2C_AMD756 is not set # CONFIG_I2C_AMD8111 is not set # CONFIG_I2C_I801 is not set # CONFIG_I2C_I810 is not set # CONFIG_I2C_PIIX4 is not set # CONFIG_I2C_NFORCE2 is not set CONFIG_I2C_OCORES=m CONFIG_I2C_PARPORT=m CONFIG_I2C_PARPORT_LIGHT=m # CONFIG_I2C_PROSAVAGE is not set # CONFIG_I2C_SAVAGE4 is not set # CONFIG_I2C_SIMTEC is not set # CONFIG_I2C_SIS5595 is not set # CONFIG_I2C_SIS630 is not set # CONFIG_I2C_SIS96X is not set # CONFIG_I2C_TAOS_EVM is not set # CONFIG_I2C_STUB is not set # CONFIG_I2C_TINY_USB is not set # CONFIG_I2C_VIA is not set # CONFIG_I2C_VIAPRO is not set # CONFIG_I2C_VOODOO3 is not set # # Miscellaneous I2C Chip support # # CONFIG_SENSORS_DS1337 is not set # CONFIG_SENSORS_DS1374 is not set # CONFIG_DS1682 is not set # CONFIG_SENSORS_EEPROM is not set # CONFIG_SENSORS_PCF8574 is not set # CONFIG_SENSORS_PCA9539 is not set # CONFIG_SENSORS_PCF8591 is not set # CONFIG_SENSORS_MAX6875 is not set # CONFIG_SENSORS_TSL2550 is not set # CONFIG_I2C_DEBUG_CORE is not set # CONFIG_I2C_DEBUG_ALGO is not set # CONFIG_I2C_DEBUG_BUS is not set # CONFIG_I2C_DEBUG_CHIP is not set # # SPI support # # CONFIG_SPI is not set # CONFIG_SPI_MASTER is not set # CONFIG_W1 is not set CONFIG_POWER_SUPPLY=y # CONFIG_POWER_SUPPLY_DEBUG is not set # CONFIG_PDA_POWER is not set # CONFIG_BATTERY_DS2760 is not set CONFIG_HWMON=m CONFIG_HWMON_VID=m # CONFIG_SENSORS_ABITUGURU is not set # CONFIG_SENSORS_ABITUGURU3 is not set # CONFIG_SENSORS_AD7418 is not set # CONFIG_SENSORS_ADM1021 is not set # CONFIG_SENSORS_ADM1025 is not set # CONFIG_SENSORS_ADM1026 is not set # CONFIG_SENSORS_ADM1029 is not set # CONFIG_SENSORS_ADM1031 is not set # CONFIG_SENSORS_ADM9240 is not set # CONFIG_SENSORS_ADT7470 is not set CONFIG_SENSORS_K8TEMP=m # CONFIG_SENSORS_ASB100 is not set # CONFIG_SENSORS_ATXP1 is not set # CONFIG_SENSORS_DS1621 is not set # CONFIG_SENSORS_I5K_AMB is not set # CONFIG_SENSORS_F71805F is not set # CONFIG_SENSORS_F71882FG is not set # CONFIG_SENSORS_F75375S is not set # CONFIG_SENSORS_FSCHER is not set # CONFIG_SENSORS_FSCPOS is not set # CONFIG_SENSORS_FSCHMD is not set # CONFIG_SENSORS_GL518SM is not set # CONFIG_SENSORS_GL520SM is not set # CONFIG_SENSORS_CORETEMP is not set CONFIG_SENSORS_IT87=m # CONFIG_SENSORS_LM63 is not set # CONFIG_SENSORS_LM75 is not set # CONFIG_SENSORS_LM77 is not set # CONFIG_SENSORS_LM78 is not set # CONFIG_SENSORS_LM80 is not set # CONFIG_SENSORS_LM83 is not set # CONFIG_SENSORS_LM85 is not set # CONFIG_SENSORS_LM87 is not set # CONFIG_SENSORS_LM90 is not set # CONFIG_SENSORS_LM92 is not set # CONFIG_SENSORS_LM93 is not set # CONFIG_SENSORS_MAX1619 is not set # CONFIG_SENSORS_MAX6650 is not set # CONFIG_SENSORS_PC87360 is not set # CONFIG_SENSORS_PC87427 is not set # CONFIG_SENSORS_SIS5595 is not set # CONFIG_SENSORS_DME1737 is not set # CONFIG_SENSORS_SMSC47M1 is not set # CONFIG_SENSORS_SMSC47M192 is not set # CONFIG_SENSORS_SMSC47B397 is not set # CONFIG_SENSORS_THMC50 is not set # CONFIG_SENSORS_VIA686A is not set # CONFIG_SENSORS_VT1211 is not set # CONFIG_SENSORS_VT8231 is not set # CONFIG_SENSORS_W83781D is not set # CONFIG_SENSORS_W83791D is not set # CONFIG_SENSORS_W83792D is not set # CONFIG_SENSORS_W83793 is not set # CONFIG_SENSORS_W83L785TS is not set # CONFIG_SENSORS_W83627HF is not set CONFIG_SENSORS_W83627EHF=m # CONFIG_SENSORS_HDAPS is not set # CONFIG_SENSORS_APPLESMC is not set # CONFIG_HWMON_DEBUG_CHIP is not set # CONFIG_WATCHDOG is not set # # Sonics Silicon Backplane # CONFIG_SSB_POSSIBLE=y # CONFIG_SSB is not set # # Multifunction device drivers # # CONFIG_MFD_SM501 is not set # # Multimedia devices # # CONFIG_VIDEO_DEV is not set # CONFIG_DVB_CORE is not set # CONFIG_DAB is not set # # Graphics support # CONFIG_AGP=y CONFIG_AGP_AMD64=y # CONFIG_AGP_INTEL is not set # CONFIG_AGP_SIS is not set # CONFIG_AGP_VIA is not set CONFIG_DRM=m # CONFIG_DRM_TDFX is not set # CONFIG_DRM_R128 is not set # CONFIG_DRM_RADEON is not set # CONFIG_DRM_MGA is not set # CONFIG_DRM_SIS is not set # CONFIG_DRM_VIA is not set # CONFIG_DRM_SAVAGE is not set CONFIG_VGASTATE=m CONFIG_VIDEO_OUTPUT_CONTROL=m CONFIG_FB=m # CONFIG_FIRMWARE_EDID is not set CONFIG_FB_DDC=m CONFIG_FB_CFB_FILLRECT=m CONFIG_FB_CFB_COPYAREA=m CONFIG_FB_CFB_IMAGEBLIT=m # CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set # CONFIG_FB_SYS_FILLRECT is not set # CONFIG_FB_SYS_COPYAREA is not set # CONFIG_FB_SYS_IMAGEBLIT is not set # CONFIG_FB_SYS_FOPS is not set CONFIG_FB_DEFERRED_IO=y # CONFIG_FB_SVGALIB is not set # CONFIG_FB_MACMODES is not set CONFIG_FB_BACKLIGHT=y CONFIG_FB_MODE_HELPERS=y # CONFIG_FB_TILEBLITTING is not set # # Frame buffer hardware drivers # # CONFIG_FB_CIRRUS is not set # CONFIG_FB_PM2 is not set # CONFIG_FB_CYBER2000 is not set # CONFIG_FB_ARC is not set # CONFIG_FB_VGA16 is not set CONFIG_FB_UVESA=m # CONFIG_FB_HECUBA is not set # CONFIG_FB_HGA is not set # CONFIG_FB_S1D13XXX is not set CONFIG_FB_NVIDIA=m CONFIG_FB_NVIDIA_I2C=y # CONFIG_FB_NVIDIA_DEBUG is not set CONFIG_FB_NVIDIA_BACKLIGHT=y # CONFIG_FB_RIVA is not set # CONFIG_FB_LE80578 is not set # CONFIG_FB_INTEL is not set # CONFIG_FB_MATROX is not set # CONFIG_FB_RADEON is not set # CONFIG_FB_ATY128 is not set # CONFIG_FB_ATY is not set # CONFIG_FB_S3 is not set # CONFIG_FB_SAVAGE is not set # CONFIG_FB_SIS is not set # CONFIG_FB_NEOMAGIC is not set # CONFIG_FB_KYRO is not set # CONFIG_FB_3DFX is not set # CONFIG_FB_VOODOO1 is not set # CONFIG_FB_VT8623 is not set # CONFIG_FB_TRIDENT is not set # CONFIG_FB_ARK is not set # CONFIG_FB_PM3 is not set # CONFIG_FB_GEODE is not set # CONFIG_FB_VIRTUAL is not set CONFIG_BACKLIGHT_LCD_SUPPORT=y CONFIG_LCD_CLASS_DEVICE=m CONFIG_BACKLIGHT_CLASS_DEVICE=m # CONFIG_BACKLIGHT_CORGI is not set # CONFIG_BACKLIGHT_PROGEAR is not set # # Display device support # # CONFIG_DISPLAY_SUPPORT is not set # # Console display driver support # CONFIG_VGA_CONSOLE=y # CONFIG_VGACON_SOFT_SCROLLBACK is not set CONFIG_VIDEO_SELECT=y CONFIG_DUMMY_CONSOLE=y CONFIG_FRAMEBUFFER_CONSOLE=m # CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY is not set # CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set CONFIG_FONTS=y # CONFIG_FONT_8x8 is not set CONFIG_FONT_8x16=y # CONFIG_FONT_6x11 is not set # CONFIG_FONT_7x14 is not set # CONFIG_FONT_PEARL_8x8 is not set # CONFIG_FONT_ACORN_8x8 is not set # CONFIG_FONT_MINI_4x6 is not set # CONFIG_FONT_SUN8x16 is not set # CONFIG_FONT_SUN12x22 is not set # CONFIG_FONT_10x18 is not set CONFIG_LOGO=y # CONFIG_LOGO_LINUX_MONO is not set CONFIG_LOGO_LINUX_VGA16=y CONFIG_LOGO_LINUX_CLUT224=y # # Sound # CONFIG_SOUND=m # # Advanced Linux Sound Architecture # CONFIG_SND=m CONFIG_SND_TIMER=m CONFIG_SND_PCM=m CONFIG_SND_HWDEP=m CONFIG_SND_RAWMIDI=m CONFIG_SND_SEQUENCER=m CONFIG_SND_SEQ_DUMMY=m CONFIG_SND_OSSEMUL=y CONFIG_SND_MIXER_OSS=m CONFIG_SND_PCM_OSS=m CONFIG_SND_PCM_OSS_PLUGINS=y CONFIG_SND_SEQUENCER_OSS=y CONFIG_SND_RTCTIMER=m CONFIG_SND_SEQ_RTCTIMER_DEFAULT=y # CONFIG_SND_DYNAMIC_MINORS is not set CONFIG_SND_SUPPORT_OLD_API=y # CONFIG_SND_VERBOSE_PROCFS is not set # CONFIG_SND_VERBOSE_PRINTK is not set # CONFIG_SND_DEBUG is not set # # Generic devices # CONFIG_SND_MPU401_UART=m CONFIG_SND_OPL3_LIB=m CONFIG_SND_AC97_CODEC=m CONFIG_SND_DUMMY=m CONFIG_SND_VIRMIDI=m # CONFIG_SND_MTPAV is not set # CONFIG_SND_MTS64 is not set # CONFIG_SND_SERIAL_U16550 is not set CONFIG_SND_MPU401=m # CONFIG_SND_PORTMAN2X4 is not set CONFIG_SND_SB_COMMON=m CONFIG_SND_SB16_DSP=m # # PCI devices # # CONFIG_SND_AD1889 is not set # CONFIG_SND_ALS300 is not set # CONFIG_SND_ALS4000 is not set CONFIG_SND_ALI5451=m # CONFIG_SND_ATIIXP is not set # CONFIG_SND_ATIIXP_MODEM is not set # CONFIG_SND_AU8810 is not set # CONFIG_SND_AU8820 is not set # CONFIG_SND_AU8830 is not set # CONFIG_SND_AZT3328 is not set # CONFIG_SND_BT87X is not set CONFIG_SND_CA0106=m CONFIG_SND_CMIPCI=m CONFIG_SND_CS4281=m CONFIG_SND_CS46XX=m CONFIG_SND_CS46XX_NEW_DSP=y CONFIG_SND_CS5530=m # CONFIG_SND_DARLA20 is not set # CONFIG_SND_GINA20 is not set # CONFIG_SND_LAYLA20 is not set # CONFIG_SND_DARLA24 is not set # CONFIG_SND_GINA24 is not set # CONFIG_SND_LAYLA24 is not set # CONFIG_SND_MONA is not set # CONFIG_SND_MIA is not set # CONFIG_SND_ECHO3G is not set # CONFIG_SND_INDIGO is not set # CONFIG_SND_INDIGOIO is not set # CONFIG_SND_INDIGODJ is not set CONFIG_SND_EMU10K1=m CONFIG_SND_EMU10K1X=m CONFIG_SND_ENS1370=m CONFIG_SND_ENS1371=m # CONFIG_SND_ES1938 is not set # CONFIG_SND_ES1968 is not set # CONFIG_SND_FM801 is not set CONFIG_SND_HDA_INTEL=m # CONFIG_SND_HDA_HWDEP is not set CONFIG_SND_HDA_CODEC_REALTEK=y # CONFIG_SND_HDA_CODEC_ANALOG is not set # CONFIG_SND_HDA_CODEC_SIGMATEL is not set # CONFIG_SND_HDA_CODEC_VIA is not set # CONFIG_SND_HDA_CODEC_ATIHDMI is not set # CONFIG_SND_HDA_CODEC_CONEXANT is not set # CONFIG_SND_HDA_CODEC_CMEDIA is not set # CONFIG_SND_HDA_CODEC_SI3054 is not set CONFIG_SND_HDA_GENERIC=y CONFIG_SND_HDA_POWER_SAVE=y CONFIG_SND_HDA_POWER_SAVE_DEFAULT=0 # CONFIG_SND_HDSP is not set # CONFIG_SND_HDSPM is not set # CONFIG_SND_ICE1712 is not set # CONFIG_SND_ICE1724 is not set CONFIG_SND_INTEL8X0=m CONFIG_SND_INTEL8X0M=m # CONFIG_SND_KORG1212 is not set # CONFIG_SND_MAESTRO3 is not set # CONFIG_SND_MIXART is not set # CONFIG_SND_NM256 is not set # CONFIG_SND_PCXHR is not set # CONFIG_SND_RIPTIDE is not set # CONFIG_SND_RME32 is not set # CONFIG_SND_RME96 is not set # CONFIG_SND_RME9652 is not set # CONFIG_SND_SONICVIBES is not set # CONFIG_SND_TRIDENT is not set # CONFIG_SND_VIA82XX is not set # CONFIG_SND_VIA82XX_MODEM is not set # CONFIG_SND_VX222 is not set # CONFIG_SND_YMFPCI is not set # CONFIG_SND_AC97_POWER_SAVE is not set # # USB devices # # CONFIG_SND_USB_AUDIO is not set # CONFIG_SND_USB_USX2Y is not set # CONFIG_SND_USB_CAIAQ is not set # # System on Chip audio support # # CONFIG_SND_SOC is not set # # SoC Audio support for SuperH # # # Open Sound System # # CONFIG_SOUND_PRIME is not set CONFIG_AC97_BUS=m CONFIG_HID_SUPPORT=y CONFIG_HID=y # CONFIG_HID_DEBUG is not set CONFIG_HIDRAW=y # # USB Input Devices # CONFIG_USB_HID=m # CONFIG_USB_HIDINPUT_POWERBOOK is not set CONFIG_HID_FF=y CONFIG_HID_PID=y CONFIG_LOGITECH_FF=y # CONFIG_PANTHERLORD_FF is not set CONFIG_THRUSTMASTER_FF=y CONFIG_ZEROPLUS_FF=y CONFIG_USB_HIDDEV=y # # USB HID Boot Protocol drivers # CONFIG_USB_KBD=m CONFIG_USB_MOUSE=m CONFIG_USB_SUPPORT=y CONFIG_USB_ARCH_HAS_HCD=y CONFIG_USB_ARCH_HAS_OHCI=y CONFIG_USB_ARCH_HAS_EHCI=y CONFIG_USB=m # CONFIG_USB_DEBUG is not set # # Miscellaneous USB options # CONFIG_USB_DEVICEFS=y CONFIG_USB_DEVICE_CLASS=y # CONFIG_USB_DYNAMIC_MINORS is not set # CONFIG_USB_SUSPEND is not set # CONFIG_USB_PERSIST is not set # CONFIG_USB_OTG is not set # # USB Host Controller Drivers # CONFIG_USB_EHCI_HCD=m CONFIG_USB_EHCI_SPLIT_ISO=y CONFIG_USB_EHCI_ROOT_HUB_TT=y CONFIG_USB_EHCI_TT_NEWSCHED=y # CONFIG_USB_ISP116X_HCD is not set CONFIG_USB_OHCI_HCD=m # CONFIG_USB_OHCI_BIG_ENDIAN_DESC is not set # CONFIG_USB_OHCI_BIG_ENDIAN_MMIO is not set CONFIG_USB_OHCI_LITTLE_ENDIAN=y # CONFIG_USB_UHCI_HCD is not set # CONFIG_USB_SL811_HCD is not set # CONFIG_USB_R8A66597_HCD is not set # # USB Device Class drivers # CONFIG_USB_ACM=m CONFIG_USB_PRINTER=m # # NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support' # # # may also be needed; see USB_STORAGE Help for more information # CONFIG_USB_STORAGE=m # CONFIG_USB_STORAGE_DEBUG is not set # CONFIG_USB_STORAGE_DATAFAB is not set # CONFIG_USB_STORAGE_FREECOM is not set # CONFIG_USB_STORAGE_ISD200 is not set # CONFIG_USB_STORAGE_DPCM is not set # CONFIG_USB_STORAGE_USBAT is not set # CONFIG_USB_STORAGE_SDDR09 is not set # CONFIG_USB_STORAGE_SDDR55 is not set # CONFIG_USB_STORAGE_JUMPSHOT is not set # CONFIG_USB_STORAGE_ALAUDA is not set # CONFIG_USB_STORAGE_KARMA is not set CONFIG_USB_LIBUSUAL=y # # USB Imaging devices # # CONFIG_USB_MDC800 is not set # CONFIG_USB_MICROTEK is not set CONFIG_USB_MON=y # # USB port drivers # # CONFIG_USB_USS720 is not set # # USB Serial Converter support # # CONFIG_USB_SERIAL is not set # # USB Miscellaneous drivers # # CONFIG_USB_EMI62 is not set # CONFIG_USB_EMI26 is not set # CONFIG_USB_ADUTUX is not set # CONFIG_USB_AUERSWALD is not set # CONFIG_USB_RIO500 is not set # CONFIG_USB_LEGOTOWER is not set # CONFIG_USB_LCD is not set # CONFIG_USB_BERRY_CHARGE is not set CONFIG_USB_LED=m # CONFIG_USB_CYPRESS_CY7C63 is not set # CONFIG_USB_CYTHERM is not set # CONFIG_USB_PHIDGET is not set # CONFIG_USB_IDMOUSE is not set # CONFIG_USB_FTDI_ELAN is not set # CONFIG_USB_APPLEDISPLAY is not set # CONFIG_USB_SISUSBVGA is not set CONFIG_USB_LD=m CONFIG_USB_TRANCEVIBRATOR=m # CONFIG_USB_IOWARRIOR is not set # CONFIG_USB_TEST is not set # # USB DSL modem support # CONFIG_USB_ATM=m CONFIG_USB_SPEEDTOUCH=m # CONFIG_USB_CXACRU is not set # CONFIG_USB_UEAGLEATM is not set # CONFIG_USB_XUSBATM is not set # # USB Gadget Support # # CONFIG_USB_GADGET is not set # CONFIG_MMC is not set CONFIG_NEW_LEDS=y CONFIG_LEDS_CLASS=m # # LED drivers # # # LED Triggers # CONFIG_LEDS_TRIGGERS=y CONFIG_LEDS_TRIGGER_TIMER=m CONFIG_LEDS_TRIGGER_HEARTBEAT=m # CONFIG_INFINIBAND is not set # CONFIG_EDAC is not set CONFIG_RTC_LIB=m CONFIG_RTC_CLASS=m # # RTC interfaces # CONFIG_RTC_INTF_SYSFS=y CONFIG_RTC_INTF_PROC=y CONFIG_RTC_INTF_DEV=y CONFIG_RTC_INTF_DEV_UIE_EMUL=y CONFIG_RTC_DRV_TEST=m # # I2C RTC drivers # CONFIG_RTC_DRV_DS1307=m # CONFIG_RTC_DRV_DS1374 is not set CONFIG_RTC_DRV_DS1672=m CONFIG_RTC_DRV_MAX6900=m CONFIG_RTC_DRV_RS5C372=m CONFIG_RTC_DRV_ISL1208=m CONFIG_RTC_DRV_X1205=m CONFIG_RTC_DRV_PCF8563=m CONFIG_RTC_DRV_PCF8583=m # CONFIG_RTC_DRV_M41T80 is not set # # SPI RTC drivers # # # Platform RTC drivers # CONFIG_RTC_DRV_CMOS=m CONFIG_RTC_DRV_DS1553=m # CONFIG_RTC_DRV_STK17TA8 is not set CONFIG_RTC_DRV_DS1742=m CONFIG_RTC_DRV_M48T86=m # CONFIG_RTC_DRV_M48T59 is not set CONFIG_RTC_DRV_V3020=m # # on-CPU RTC drivers # # CONFIG_DMADEVICES is not set # CONFIG_AUXDISPLAY is not set CONFIG_VIRTUALIZATION=y CONFIG_KVM=m # CONFIG_KVM_INTEL is not set CONFIG_KVM_AMD=m # # Userspace I/O # # CONFIG_UIO is not set # # Firmware Drivers # # CONFIG_EDD is not set # CONFIG_DELL_RBU is not set # CONFIG_DCDBAS is not set CONFIG_DMIID=y # # File systems # CONFIG_EXT2_FS=y # CONFIG_EXT2_FS_XATTR is not set # CONFIG_EXT2_FS_XIP is not set CONFIG_EXT3_FS=m CONFIG_EXT3_FS_XATTR=y CONFIG_EXT3_FS_POSIX_ACL=y CONFIG_EXT3_FS_SECURITY=y # CONFIG_EXT4DEV_FS is not set CONFIG_JBD=m # CONFIG_JBD_DEBUG is not set CONFIG_FS_MBCACHE=y # CONFIG_REISERFS_FS is not set CONFIG_JFS_FS=y CONFIG_JFS_POSIX_ACL=y CONFIG_JFS_SECURITY=y # CONFIG_JFS_DEBUG is not set CONFIG_JFS_STATISTICS=y CONFIG_FS_POSIX_ACL=y # CONFIG_XFS_FS is not set # CONFIG_GFS2_FS is not set # CONFIG_OCFS2_FS is not set # CONFIG_MINIX_FS is not set # CONFIG_ROMFS_FS is not set CONFIG_INOTIFY=y CONFIG_INOTIFY_USER=y # CONFIG_QUOTA is not set # CONFIG_DNOTIFY is not set # CONFIG_AUTOFS_FS is not set # CONFIG_AUTOFS4_FS is not set CONFIG_FUSE_FS=m # # CD-ROM/DVD Filesystems # CONFIG_ISO9660_FS=m CONFIG_JOLIET=y CONFIG_ZISOFS=y CONFIG_UDF_FS=m CONFIG_UDF_NLS=y # # DOS/FAT/NT Filesystems # CONFIG_FAT_FS=m CONFIG_MSDOS_FS=m CONFIG_VFAT_FS=m CONFIG_FAT_DEFAULT_CODEPAGE=850 CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1" CONFIG_NTFS_FS=m # CONFIG_NTFS_DEBUG is not set CONFIG_NTFS_RW=y # # Pseudo filesystems # CONFIG_PROC_FS=y CONFIG_PROC_KCORE=y CONFIG_PROC_SYSCTL=y CONFIG_SYSFS=y CONFIG_TMPFS=y # CONFIG_TMPFS_POSIX_ACL is not set # CONFIG_HUGETLBFS is not set # CONFIG_HUGETLB_PAGE is not set CONFIG_CONFIGFS_FS=m # # Miscellaneous filesystems # # CONFIG_ADFS_FS is not set # CONFIG_AFFS_FS is not set CONFIG_ECRYPT_FS=m # CONFIG_HFS_FS is not set # CONFIG_HFSPLUS_FS is not set # CONFIG_BEFS_FS is not set # CONFIG_BFS_FS is not set # CONFIG_EFS_FS is not set CONFIG_CRAMFS=y # CONFIG_VXFS_FS is not set # CONFIG_HPFS_FS is not set # CONFIG_QNX4FS_FS is not set # CONFIG_SYSV_FS is not set # CONFIG_UFS_FS is not set CONFIG_NETWORK_FILESYSTEMS=y # CONFIG_NFS_FS is not set # CONFIG_NFSD is not set # CONFIG_SMB_FS is not set CONFIG_CIFS=m CONFIG_CIFS_STATS=y # CONFIG_CIFS_STATS2 is not set CONFIG_CIFS_WEAK_PW_HASH=y CONFIG_CIFS_XATTR=y CONFIG_CIFS_POSIX=y # CONFIG_CIFS_DEBUG2 is not set CONFIG_CIFS_EXPERIMENTAL=y CONFIG_CIFS_UPCALL=y # CONFIG_NCP_FS is not set # CONFIG_CODA_FS is not set # CONFIG_AFS_FS is not set CONFIG_9P_FS=m # # Partition Types # CONFIG_PARTITION_ADVANCED=y # CONFIG_ACORN_PARTITION is not set # CONFIG_OSF_PARTITION is not set # CONFIG_AMIGA_PARTITION is not set # CONFIG_ATARI_PARTITION is not set # CONFIG_MAC_PARTITION is not set CONFIG_MSDOS_PARTITION=y # CONFIG_BSD_DISKLABEL is not set # CONFIG_MINIX_SUBPARTITION is not set # CONFIG_SOLARIS_X86_PARTITION is not set # CONFIG_UNIXWARE_DISKLABEL is not set CONFIG_LDM_PARTITION=y CONFIG_LDM_DEBUG=y # CONFIG_SGI_PARTITION is not set # CONFIG_ULTRIX_PARTITION is not set # CONFIG_SUN_PARTITION is not set CONFIG_KARMA_PARTITION=y CONFIG_EFI_PARTITION=y # CONFIG_SYSV68_PARTITION is not set CONFIG_NLS=y CONFIG_NLS_DEFAULT="cp850" # CONFIG_NLS_CODEPAGE_437 is not set # CONFIG_NLS_CODEPAGE_737 is not set # CONFIG_NLS_CODEPAGE_775 is not set CONFIG_NLS_CODEPAGE_850=m # CONFIG_NLS_CODEPAGE_852 is not set # CONFIG_NLS_CODEPAGE_855 is not set # CONFIG_NLS_CODEPAGE_857 is not set CONFIG_NLS_CODEPAGE_860=m # CONFIG_NLS_CODEPAGE_861 is not set # CONFIG_NLS_CODEPAGE_862 is not set # CONFIG_NLS_CODEPAGE_863 is not set # CONFIG_NLS_CODEPAGE_864 is not set # CONFIG_NLS_CODEPAGE_865 is not set # CONFIG_NLS_CODEPAGE_866 is not set # CONFIG_NLS_CODEPAGE_869 is not set # CONFIG_NLS_CODEPAGE_936 is not set # CONFIG_NLS_CODEPAGE_950 is not set # CONFIG_NLS_CODEPAGE_932 is not set # CONFIG_NLS_CODEPAGE_949 is not set # CONFIG_NLS_CODEPAGE_874 is not set # CONFIG_NLS_ISO8859_8 is not set # CONFIG_NLS_CODEPAGE_1250 is not set # CONFIG_NLS_CODEPAGE_1251 is not set # CONFIG_NLS_ASCII is not set CONFIG_NLS_ISO8859_1=m # CONFIG_NLS_ISO8859_2 is not set CONFIG_NLS_ISO8859_3=m # CONFIG_NLS_ISO8859_4 is not set # CONFIG_NLS_ISO8859_5 is not set # CONFIG_NLS_ISO8859_6 is not set # CONFIG_NLS_ISO8859_7 is not set # CONFIG_NLS_ISO8859_9 is not set # CONFIG_NLS_ISO8859_13 is not set CONFIG_NLS_ISO8859_14=m CONFIG_NLS_ISO8859_15=m # CONFIG_NLS_KOI8_R is not set # CONFIG_NLS_KOI8_U is not set CONFIG_NLS_UTF8=m # CONFIG_DLM is not set # CONFIG_INSTRUMENTATION is not set # # Kernel hacking # CONFIG_TRACE_IRQFLAGS_SUPPORT=y CONFIG_PRINTK_TIME=y CONFIG_ENABLE_WARN_DEPRECATED=y CONFIG_ENABLE_MUST_CHECK=y CONFIG_MAGIC_SYSRQ=y # CONFIG_UNUSED_SYMBOLS is not set CONFIG_DEBUG_FS=y # CONFIG_HEADERS_CHECK is not set CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_SHIRQ=y CONFIG_DETECT_SOFTLOCKUP=y # CONFIG_SCHED_DEBUG is not set # CONFIG_SCHEDSTATS is not set # CONFIG_TIMER_STATS is not set # CONFIG_SLUB_DEBUG_ON is not set # CONFIG_DEBUG_PREEMPT is not set # CONFIG_DEBUG_RT_MUTEXES is not set # CONFIG_RT_MUTEX_TESTER is not set # CONFIG_DEBUG_SPINLOCK is not set # CONFIG_DEBUG_MUTEXES is not set # CONFIG_DEBUG_LOCK_ALLOC is not set # CONFIG_PROVE_LOCKING is not set # CONFIG_LOCK_STAT is not set # CONFIG_DEBUG_SPINLOCK_SLEEP is not set # CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set # CONFIG_DEBUG_KOBJECT is not set CONFIG_DEBUG_BUGVERBOSE=y # CONFIG_DEBUG_INFO is not set # CONFIG_DEBUG_VM is not set # CONFIG_DEBUG_LIST is not set # CONFIG_DEBUG_SG is not set # CONFIG_FRAME_POINTER is not set # CONFIG_FORCED_INLINING is not set # CONFIG_BOOT_PRINTK_DELAY is not set # CONFIG_RCU_TORTURE_TEST is not set # CONFIG_FAULT_INJECTION is not set # CONFIG_SAMPLES is not set CONFIG_EARLY_PRINTK=y # CONFIG_DEBUG_STACKOVERFLOW is not set # CONFIG_DEBUG_STACK_USAGE is not set # CONFIG_DEBUG_RODATA is not set # CONFIG_IOMMU_DEBUG is not set # # Security options # CONFIG_KEYS=y CONFIG_KEYS_DEBUG_PROC_KEYS=y CONFIG_SECURITY=y CONFIG_SECURITY_NETWORK=y CONFIG_SECURITY_NETWORK_XFRM=y CONFIG_SECURITY_CAPABILITIES=y CONFIG_SECURITY_FILE_CAPABILITIES=y CONFIG_CRYPTO=y CONFIG_CRYPTO_ALGAPI=m CONFIG_CRYPTO_ABLKCIPHER=m CONFIG_CRYPTO_AEAD=m CONFIG_CRYPTO_BLKCIPHER=m CONFIG_CRYPTO_HASH=m CONFIG_CRYPTO_MANAGER=m CONFIG_CRYPTO_HMAC=m CONFIG_CRYPTO_XCBC=m CONFIG_CRYPTO_NULL=m CONFIG_CRYPTO_MD4=m CONFIG_CRYPTO_MD5=m CONFIG_CRYPTO_SHA1=m CONFIG_CRYPTO_SHA256=m CONFIG_CRYPTO_SHA512=m CONFIG_CRYPTO_WP512=m CONFIG_CRYPTO_TGR192=m CONFIG_CRYPTO_GF128MUL=m CONFIG_CRYPTO_ECB=m CONFIG_CRYPTO_CBC=m CONFIG_CRYPTO_PCBC=m CONFIG_CRYPTO_LRW=m CONFIG_CRYPTO_XTS=m CONFIG_CRYPTO_CRYPTD=m CONFIG_CRYPTO_DES=m CONFIG_CRYPTO_FCRYPT=m CONFIG_CRYPTO_BLOWFISH=m CONFIG_CRYPTO_TWOFISH=m CONFIG_CRYPTO_TWOFISH_COMMON=m CONFIG_CRYPTO_TWOFISH_X86_64=m CONFIG_CRYPTO_SERPENT=m CONFIG_CRYPTO_AES=m CONFIG_CRYPTO_AES_X86_64=m CONFIG_CRYPTO_CAST5=m CONFIG_CRYPTO_CAST6=m CONFIG_CRYPTO_TEA=m CONFIG_CRYPTO_ARC4=m CONFIG_CRYPTO_KHAZAD=m CONFIG_CRYPTO_ANUBIS=m CONFIG_CRYPTO_SEED=m CONFIG_CRYPTO_DEFLATE=m CONFIG_CRYPTO_MICHAEL_MIC=m CONFIG_CRYPTO_CRC32C=m CONFIG_CRYPTO_CAMELLIA=m # CONFIG_CRYPTO_TEST is not set CONFIG_CRYPTO_AUTHENC=m # CONFIG_CRYPTO_HW is not set # # Library routines # CONFIG_BITREVERSE=y CONFIG_CRC_CCITT=m CONFIG_CRC16=m CONFIG_CRC_ITU_T=m CONFIG_CRC32=y CONFIG_CRC7=m CONFIG_LIBCRC32C=m CONFIG_ZLIB_INFLATE=y CONFIG_ZLIB_DEFLATE=m CONFIG_TEXTSEARCH=y CONFIG_TEXTSEARCH_KMP=m CONFIG_TEXTSEARCH_BM=m CONFIG_TEXTSEARCH_FSM=m CONFIG_PLIST=y CONFIG_HAS_IOMEM=y CONFIG_HAS_IOPORT=y CONFIG_HAS_DMA=y
Reply-To: parag.warudkar@gmail.com On Thu, 7 Feb 2008, Alejandro Riveira Fernández wrote: > gcc --version > > gcc-4.2 (GCC) 4.2.1 (Ubuntu 4.2.1-5ubuntu4) > > If some fields are empty or look unusual you may have an old version. > Compare to the current minimal requirements in Documentation/Changes. > > Linux Varda 2.6.24 #2 SMP PREEMPT Fri Jan 25 01:05:47 CET 2008 x86_64 > GNU/Linux > So x86+SMP+GnuC-4.1.2+Glibc-2.5 = Not reproducible. x86_64+SMP+PREEMPT+GnuC-4.1.2+Glibc-2.5 = Reproducible. Not sure what the original reporter's $ARCH was. So next thing worthwhile to try might be to disable PREEMPT and see if that cures it. Parag
Reply-To: parag.warudkar@gmail.com On Thu, 7 Feb 2008, Parag Warudkar wrote: > x86_64+SMP+PREEMPT+GnuC-4.1.2+Glibc-2.5 = Reproducible. > That should of course be x86_64+SMP+PREEMPT+GnuC-4.1.3+Glibc-2.6.1 = Reproducible.
Reply-To: ariveira@gmail.com El Thu, 7 Feb 2008 10:56:16 -0500 (EST) Parag Warudkar <parag.warudkar@gmail.com> escribió: > > > On Thu, 7 Feb 2008, Parag Warudkar wrote: > > > x86_64+SMP+PREEMPT+GnuC-4.1.2+Glibc-2.5 = Reproducible. > > > That should of course be > x86_64+SMP+PREEMPT+GnuC-4.1.3+Glibc-2.6.1 = Reproducible. > From my previous mail Note that i use CC=gcc-4.2 $gcc-4.2 --version gcc-4.2 (GCC) 4.2.1 (Ubuntu 4.2.1-5ubuntu4)
Reply-To: parag.warudkar@gmail.com On Thu, 7 Feb 2008, Alejandro Riveira Fernández wrote: > El Thu, 7 Feb 2008 10:56:16 -0500 (EST) > Parag Warudkar <parag.warudkar@gmail.com> escribió: > > > > > > > On Thu, 7 Feb 2008, Parag Warudkar wrote: > > > > > x86_64+SMP+PREEMPT+GnuC-4.1.2+Glibc-2.5 = Reproducible. > > > > > That should of course be > > x86_64+SMP+PREEMPT+GnuC-4.1.3+Glibc-2.6.1 = Reproducible. > > > From my previous mail > > Note that i use CC=gcc-4.2 > > $gcc-4.2 --version > > gcc-4.2 (GCC) 4.2.1 (Ubuntu 4.2.1-5ubuntu4) > Yep. I will enable PREEMPT and see if it reproduces for me. Thanks Parag
Reply-To: parag.warudkar@gmail.com On Thu, 7 Feb 2008, Parag Warudkar wrote: > Yep. I will enable PREEMPT and see if it reproduces for me. Not reproducible with PREEMPT either. Parag
On Thu, 2008-02-07 at 10:53 -0500, Parag Warudkar wrote: > > On Thu, 7 Feb 2008, Alejandro Riveira Fern
For the record, a couple of us here have been investigating this thing and have concluded that the problem lies in the implementation of run_posix_cpu_timers() and specifically in the quadratic nature of the implementation. It calls check_process_timers() to sum the utime/stime/sched_time (in 2.6.18.5, under another name in 2.6.24+) of all threads in the thread group. This means that runtime there grows with the number of threads. It can go through the list _again_ if and when it decides to rebalance expiry times. Working on a potential fix.
On Thu, 2008-02-07 at 11:53 -0500, Parag Warudkar wrote: > On Thu, 7 Feb 2008, Parag Warudkar wrote: > > Yep. I will enable PREEMPT and see if it reproduces for me. > > Not reproducible with PREEMPT either. Okay, here's an analysis of the problem and a potential solution. I mentioned this in the bug itself but I'll repeat it here: A couple of us here have been investigating this thing and have concluded that the problem lies in the implementation of run_posix_cpu_timers() and specifically in the quadratic nature of the implementation. It calls check_process_timers() to sum the utime/stime/sched_time (in 2.6.18.5, under another name in 2.6.24+) of all threads in the thread group. This means that runtime there grows with the number of threads. It can go through the list _again_ if and when it decides to rebalance expiry times. After thinking through it, it seems clear that the critical number of threads is that in which run_posix_cpu_timers() takes as long as or longer than a tick to get its work done. The system makes progress to that point but after that everything goes to hell as it gets further and further behind. This explains all the symptoms we've seen, including seeing run_posix_cpu_timers() at the top of a bunch of profiling stats (I saw it get more than a third of overall processing time on a bunch of tests, even where the system _didn't_ hang!). It explains the fact that things get slow right before they go to hell and it explains why under certain conditions the system can recover (if the threads have started exiting by the time it hangs, for example). I've come up with a potential fix for the problem. It does two things. First, rather than summing the utime/stime/sched_time at interrupt it adds all of those times to a new task_struct field on the group leader then at interrupt just consults those fields; this avoids repeatedly blowing the cache as well as a loop across all the threads. Second, if there are more than 1000 threads in the process (as noted in task->signal->live), it just punts all of the processing to a workqueue. With these changes I've gone from a hang at 4500 (or fewer) threads to running out of resources at more than 32000 threads on a single-CPU box. When I've finished testing I'll polish the patch a bit and submit it to the LKML but I thought you guys might want to know the state of things. Oh, and one more note: This bug is also dependent on HZ, since it matters how long a tick is. I've been running with HZ=1000. A faster machine or one with HZ=100 would potentially need to generate a _lot_ more threads to see the hang.
> With these changes I've gone from a hang at 4500 (or fewer) threads to > running out of resources at more than 32000 threads on a single-CPU > box. When I've finished testing I'll polish the patch a bit and submit > it to the LKML but I thought you guys might want to know the state of > things. yeah - great, please send this to lkml ASAP. Ingo
Thanks for the detailed explanation and for bringing this to my attention. This is a problem we knew about when I first implemented posix-cpu-timers and process-wide SIGPROF/SIGVTALRM. I'm a little surprised it took this long to become a problem in practice. I originally expected to have to revisit it sooner than this, but I certainly haven't thought about it for quite some time. I'd guess that HZ=1000 becoming common is what did it. The obvious implementation for the process-wide clocks is to have the tick interrupt increment shared utime/stime/sched_time fields in signal_struct as well as the private task_struct fields. The all-threads totals accumulate in the signal_struct fields, which would be atomic_t. It's then trivial for the timer expiry checks to compare against those totals. The concern I had about this was multiple CPUs competing for the signal_struct fields. (That is, several CPUs all running threads in the same process.) If the ticks on each CPU are even close to synchronized, then every single time all those CPUs will do an atomic_add on the same word. I'm not any kind of expert on SMP and cache effects, but I know this is bad. However bad it is, it's that bad all the time and however few threads (down to 2) it's that bad for that many CPUs. The implementation we have instead is obviously dismal for large numbers of threads. I always figured we'd replace that with something based on more sophisticated thinking about the CPU-clash issue. I don't entirely follow your description of your patch. It sounds like it should be two patches, though. The second of those patches (workqueue) sounds like it could be an appropriate generic cleanup, or like it could be a complication that might be unnecessary if we get a really good solution to main issue. The first patch I'm not sure whether I understand what you said or not. Can you elaborate? Or just post the unfinished patch as illustration, marking it as not for submission until you've finished. Thanks, Roland
My first patch did essentially what you outlined above, incrementing shared utime/stime/sched_time fields, except that they were in the task_struct of the group leader rather than in the signal_struct. It's not clear to me exactly how the signal_struct is shared, whether it is shared among all threads or if each has its own version. So each timer routine had something like: /* If we're part of a thread group, add our time to the leader. */ if (p->group_leader != NULL) p->group_leader->threads_sched_time += tmp; and check_process_timers() had /* Times for the whole thread group are held by the group leader. */ utime = cputime_add(utime, tsk->group_leader->threads_utime); stime = cputime_add(stime, tsk->group_leader->threads_stime); sched_time += tsk->group_leader->threads_sched_time; Of course, this alone is insufficient. It speeds things up a tiny bit but not nearly enough. The other issue has to do with the rest of the processing in run_posix_cpu_timers(), walking the timer lists and walking the whole thread group (again) to rebalance expiry times. My second patch moved all that work to a workqueue, but only if there were more than 100 threads in the process. This basically papered over the problem by moving the processing out of interrupt and into a kernel thread. It's still insufficient, though, because it takes just as long and will get backed up just as badly on large numbers of threads. This was made clear in a test I ran yesterday where I generated some 200,000 threads. The work queue was unreasonably large, as you might expect. I am looking for a way to do everything that needs to be done in fewer operations, but unfortunately I'm not familiar enough with the SIGPROF/SIGVTALRM semantics or with the details of the Linux implementation to know where it is safe to consolidate things.
Patch submitted to LKML today.