Created attachment 132111 [details] Logs and system info I'm getting regular kernel paging request errors on a server running a vanilla kernel 2.6.32.61. Since 7 march, there have been 10 such errors. We have not been able to identify circumstances in which this bug happens. Here is the last one: BUG: unable to handle kernel paging request at ffff8804c001fb39 IP: [<ffffffff810bdbf3>] page_evictable+0x25/0x81 PGD 1002063 PUD 0 Oops: 0000 [#1] SMP last sysfs file: /sys/devices/system/cpu/cpu15/topology/thread_siblings CPU 6 Modules linked in: ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_tcpudp kvm_amd kvm ip6table_filter ip6_tables iptable_filter ip_tables x_tables tun nfsd exportfs nfs lockd fscache nfs_acl auth_rpcgss sunrpc bridge stp bonding dm_round_robin dm_multipath scsi_dh loop snd_pcm snd_timer snd soundcore snd_page_alloc serio_raw evdev tpm_tis tpm tpm_bios psmouse pcspkr button amd64_edac_mod edac_core edac_mce_amd container i2c_piix4 shpchp pci_hotplug i2c_core processor ext3 jbd mbcache dm_mirror dm_region_hash dm_log dm_snapshot dm_mod sd_mod crc_t10dif lpfc mptsas scsi_transport_fc mptscsih mptbase scsi_tgt ehci_hcd scsi_transport_sas tg3 ohci_hcd libphy scsi_mod usbcore nls_base thermal fan thermal_sys [last unloaded: scsi_wait_scan] Pid: 185, comm: kswapd0 Not tainted 2.6.32.61vanilla #1 PRIMERGY BX630 S2 RIP: 0010:[<ffffffff810bdbf3>] [<ffffffff810bdbf3>] page_evictable+0x25/0x81 RSP: 0018:ffff880416a3ba80 EFLAGS: 00010282 RAX: ffff8804c001fad6 RBX: ffffea000ba17088 RCX: 0000000000000020 RDX: 020000000002004c RSI: 0000000000000000 RDI: ffffea000ba17088 RBP: ffff880000015c80 R08: ffff880426458f00 R09: ffff880000015c80 R10: 0000000000000002 R11: ffff8800451e9850 R12: ffffea000ba170b0 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020 FS: 00007f9e11b07820(0000) GS:ffff88000fcc0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: ffff8804c001fb39 CR3: 00000001ac27d000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process kswapd0 (pid: 185, threadinfo ffff880416a3a000, task ffff8804150f4600) Stack: 0000000000000020 ffffffff810bec01 0000000000000000 ffffea0000000001 <0> ffffea0000000001 ffffea0005cdd6f8 0000000000000009 ffff880416a3bb00 <0> ffff880416a3be10 ffff8800000170c0 0000001500000000 ffff8800000170c0 Call Trace: [<ffffffff810bec01>] ? shrink_active_list+0x19e/0x2d9 [<ffffffff810bedfb>] ? shrink_list+0xbf/0x767 [<ffffffff810bb3c9>] ? determine_dirtyable_memory+0xd/0x1d [<ffffffff810bb441>] ? get_dirty_limits+0x1d/0x259 [<ffffffff810bf723>] ? shrink_zone+0x280/0x342 [<ffffffff810c0148>] ? kswapd+0x4b9/0x683 [<ffffffff810bd7df>] ? isolate_pages_global+0x0/0x20f [<ffffffff810651de>] ? autoremove_wake_function+0x0/0x2e [<ffffffff810bfc8f>] ? kswapd+0x0/0x683 [<ffffffff81064f11>] ? kthread+0x79/0x81 [<ffffffff81011baa>] ? child_rip+0xa/0x20 [<ffffffff81064e98>] ? kthread+0x0/0x81 [<ffffffff81011ba0>] ? child_rip+0x0/0x20 Code: 81 e9 83 2a 16 00 48 83 ec 08 48 8b 17 48 8b 47 18 f7 c2 00 00 01 00 74 09 48 c7 c0 80 9f 46 81 eb 09 a8 01 75 0b 48 85 c0 74 06 <f6> 40 63 02 75 4b f7 c2 00 00 40 00 75 43 48 85 f6 74 42 48 8b RIP [<ffffffff810bdbf3>] page_evictable+0x25/0x81 RSP <ffff880416a3ba80> CR2: ffff8804c001fb39 ---[ end trace 41d830aa2ac6f872 ]--- The reported address ffff8804c001fb39 is according to https://www.kernel.org/doc/Documentation/x86/x86_64/mm.txt a direct mapping to physical memory, but it is located at about 19.5Gb, which is over the total physical memory. Addresses reported in these 10 occurences of the error are: 00000000c001fade ffff8804c001fade ffff8804c001fb2e ffff8804c001fb39 The server has 16Gb of RAM, 32Gb of swap. The server is mainly used to run KVM guest instances (10) and the total memory configured for KVM instances is 13.5Gb. Below are further details. In the attached file also contains the files cpuinfo.txt dmesg.txt lspci.txt meminfo.txt proc_scsi_scsi.txt The dmesg.txt file contains the log of 8 additional occurences of the error. I can provide further info if needed. ~# cat /proc/version Linux version 2.6.32.61vanilla (root@sSlave01) (gcc version 4.3.2 (Debian 4.3.2-1.1) ) #1 SMP Fri Mar 7 13:29:11 CET 2014 # ./ver_linux If some fields are empty or look unusual you may have an old version. Compare to the current minimal requirements in Documentation/Changes. Linux sMaster01 2.6.32.61vanilla #1 SMP Fri Mar 7 13:29:11 CET 2014 x86_64 GNU/Linux Gnu C 4.3.2 Gnu make 3.81 binutils 2.18.0.20080103 util-linux 2.13.1.1 mount 2.13.1.1 module-init-tools 3.4 e2fsprogs 1.41.3 Linux C Library 2.7 Dynamic linker (ldd) 2.7 Procps 3.2.7 Net-tools 1.60 Console-tools 0.2.3 Sh-utils 6.10 udev 125 Modules Loaded ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_tcpudp kvm_amd kvm ip6table_filter ip6_tables iptable_filter ip_tables x_tables tun nfsd exportfs nfs lockd fscache nfs_acl auth_rpcgss sunrpc bridge stp bonding dm_round_robin dm_multipath scsi_dh loop snd_pcm snd_timer snd soundcore serio_raw snd_page_alloc tpm_tis psmouse tpm tpm_bios pcspkr evdev amd64_edac_mod edac_core edac_mce_amd button container i2c_piix4 processor shpchp pci_hotplug i2c_core ext3 jbd mbcache dm_mirror dm_region_hash dm_log dm_snapshot dm_mod sd_mod crc_t10dif mptsas lpfc mptscsih scsi_transport_fc ehci_hcd mptbase scsi_tgt scsi_transport_sas tg3 ohci_hcd libphy scsi_mod usbcore nls_base thermal fan thermal_sys There are 16 cores, here's an extract: # cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 16 model : 4 model name : Quad-Core AMD Opteron(tm) Processor 8380 stepping : 2 cpu MHz : 2500.037 cache size : 512 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 4 apicid : 4 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 5 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt bogomips : 5000.06 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm stc 100mhzsteps hwpstate # cat /proc/modules ipt_MASQUERADE 1554 0 - Live 0xffffffffa01d2000 iptable_nat 4203 0 - Live 0xffffffffa0185000 nf_nat 13100 2 ipt_MASQUERADE,iptable_nat, Live 0xffffffffa01b3000 nf_conntrack_ipv4 9849 3 iptable_nat,nf_nat, Live 0xffffffffa0171000 nf_defrag_ipv4 1139 1 nf_conntrack_ipv4, Live 0xffffffffa0160000 xt_conntrack 2407 0 - Live 0xffffffffa0095000 nf_conntrack 45959 5 ipt_MASQUERADE,iptable_nat,nf_nat,nf_conntrack_ipv4,xt_conntrack, Live 0xffffffffa029e000 ipt_REJECT 1953 0 - Live 0xffffffffa007b000 xt_tcpudp 2319 0 - Live 0xffffffffa001c000 kvm_amd 31620 36 - Live 0xffffffffa014f000 kvm 214143 1 kvm_amd, Live 0xffffffffa045a000 ip6table_filter 2384 0 - Live 0xffffffffa0457000 ip6_tables 15091 1 ip6table_filter, Live 0xffffffffa044d000 iptable_filter 2258 0 - Live 0xffffffffa0447000 ip_tables 13915 2 iptable_nat,iptable_filter, Live 0xffffffffa043d000 x_tables 12845 7 ipt_MASQUERADE,iptable_nat,xt_conntrack,ipt_REJECT,xt_tcpudp,ip6_tables,ip_tables, Live 0xffffffffa0431000 tun 10748 22 - Live 0xffffffffa0428000 nfsd 252542 13 - Live 0xffffffffa03db000 exportfs 3074 1 nfsd, Live 0xffffffffa03d5000 nfs 239354 0 - Live 0xffffffffa0386000 lockd 57267 2 nfsd,nfs, Live 0xffffffffa036f000 fscache 29162 1 nfs, Live 0xffffffffa035d000 nfs_acl 2031 2 nfsd,nfs, Live 0xffffffffa0357000 auth_rpcgss 33316 2 nfsd,nfs, Live 0xffffffffa0346000 sunrpc 160476 21 nfsd,nfs,lockd,nfs_acl,auth_rpcgss, Live 0xffffffffa0307000 bridge 39278 0 - Live 0xffffffffa02f4000 stp 1440 1 bridge, Live 0xffffffffa02ee000 bonding 73895 0 - Live 0xffffffffa02d1000 dm_round_robin 2228 12 - Live 0xffffffffa02cb000 dm_multipath 13088 7 dm_round_robin, Live 0xffffffffa02c1000 scsi_dh 4640 1 dm_multipath, Live 0xffffffffa02b9000 loop 11703 0 - Live 0xffffffffa02b0000 snd_pcm 60487 0 - Live 0xffffffffa028d000 snd_timer 15534 1 snd_pcm, Live 0xffffffffa0282000 snd 46430 2 snd_pcm,snd_timer, Live 0xffffffffa026a000 soundcore 4598 1 snd, Live 0xffffffffa0262000 serio_raw 3752 0 - Live 0xffffffffa025c000 snd_page_alloc 6089 1 snd_pcm, Live 0xffffffffa0254000 tpm_tis 7448 0 - Live 0xffffffffa024c000 psmouse 49681 0 - Live 0xffffffffa0237000 tpm 10023 1 tpm_tis, Live 0xffffffffa022d000 tpm_bios 4521 1 tpm, Live 0xffffffffa0226000 pcspkr 1699 0 - Live 0xffffffffa0220000 evdev 7352 2 - Live 0xffffffffa0218000 amd64_edac_mod 13710 0 - Live 0xffffffffa020d000 edac_core 29261 6 amd64_edac_mod, Live 0xffffffffa01fb000 edac_mce_amd 6337 1 amd64_edac_mod, Live 0xffffffffa01f4000 button 4650 0 - Live 0xffffffffa01ec000 container 2389 0 - Live 0xffffffffa0080000 i2c_piix4 8328 0 - Live 0xffffffffa01e4000 processor 29727 0 - Live 0xffffffffa01d4000 shpchp 26248 0 - Live 0xffffffffa01c6000 pci_hotplug 21587 1 shpchp, Live 0xffffffffa01b9000 i2c_core 15739 1 i2c_piix4, Live 0xffffffffa01ad000 ext3 105686 3 - Live 0xffffffffa0188000 jbd 36877 1 ext3, Live 0xffffffffa0175000 mbcache 5050 1 ext3, Live 0xffffffffa016d000 dm_mirror 10827 0 - Live 0xffffffffa0164000 dm_region_hash 6584 1 dm_mirror, Live 0xffffffffa015c000 dm_log 7381 2 dm_mirror,dm_region_hash, Live 0xffffffffa00cb000 dm_snapshot 18289 0 - Live 0xffffffffa003f000 dm_mod 53338 35 dm_multipath,dm_mirror,dm_log,dm_snapshot, Live 0xffffffffa012b000 sd_mod 29657 15 - Live 0xffffffffa0145000 crc_t10dif 1276 1 sd_mod, Live 0xffffffffa000c000 mptsas 28916 2 - Live 0xffffffffa013b000 lpfc 360864 24 - Live 0xffffffffa00d0000 mptscsih 16360 1 mptsas, Live 0xffffffffa0088000 scsi_transport_fc 35131 1 lpfc, Live 0xffffffffa0070000 ehci_hcd 31457 0 - Live 0xffffffffa00c1000 mptbase 48190 2 mptsas,mptscsih, Live 0xffffffffa00b3000 scsi_tgt 8466 1 scsi_transport_fc, Live 0xffffffffa0005000 scsi_transport_sas 19673 1 mptsas, Live 0xffffffffa0046000 tg3 95311 0 - Live 0xffffffffa0099000 ohci_hcd 19071 0 - Live 0xffffffffa008e000 libphy 13446 1 tg3, Live 0xffffffffa0082000 scsi_mod 126117 8 scsi_dh,sd_mod,mptsas,lpfc,mptscsih,scsi_transport_fc,scsi_tgt,scsi_transport_sas, Live 0xffffffffa004f000 usbcore 122727 3 ehci_hcd,ohci_hcd, Live 0xffffffffa001f000 nls_base 6457 1 usbcore, Live 0xffffffffa0018000 thermal 11674 0 - Live 0xffffffffa000f000 fan 3346 0 - Live 0xffffffffa0009000 thermal_sys 11942 3 processor,thermal,fan, Live 0xffffffffa0000000 # cat /proc/ioports 0000-3fff : PCI Bus #00 0000-001f : dma1 0020-0021 : pic1 0040-0043 : timer0 0050-0053 : timer1 0060-0060 : keyboard 0064-0064 : keyboard 0070-0071 : rtc0 0080-008f : dma page reg 00a0-00a1 : pic2 00c0-00df : dma2 00f0-00ff : fpu 0100-0101 : pnp 00:09 0200-020f : pnp 00:09 02f8-02ff : serial 03c0-03df : vga+ 03f8-03ff : serial 040b-040b : pnp 00:09 04d0-04d1 : pnp 00:09 04d6-04d6 : pnp 00:09 0500-0560 : pnp 00:09 0500-0503 : ACPI PM1a_EVT_BLK 0504-0505 : ACPI PM1a_CNT_BLK 0508-050b : ACPI PM_TMR 050c-0511 : ACPI CPU throttle 0514-051b : ACPI GPE1_BLK 0540-0543 : ACPI PM1b_EVT_BLK 0544-0545 : ACPI PM1b_CNT_BLK 0550-0557 : ACPI GPE0_BLK 0558-055b : pnp 00:09 0580-058f : pnp 00:09 0580-0587 : piix4_smbus 0590-0593 : pnp 00:09 0600-061f : pnp 00:09 0620-0623 : pnp 00:09 0624-067f : pnp 00:09 06c0-06c0 : pnp 00:09 0700-0703 : pnp 00:09 0c00-0c01 : pnp 00:09 0c06-0c08 : pnp 00:09 0c14-0c14 : pnp 00:09 0c49-0c4a : pnp 00:09 0c50-0c53 : pnp 00:09 0c6c-0c6c : pnp 00:09 0c6f-0c6f : pnp 00:09 0ca4-0ca5 : pnp 00:09 0cd6-0cd7 : pnp 00:09 0cf8-0cff : PCI conf1 0e00-0e7f : pnp 00:09 0f00-0f7f : pnp 00:09 0f50-0f58 : pnp 00:09 1000-10ff : 0000:00:03.0 1400-14ff : 0000:00:03.1 1800-18ff : 0000:00:03.2 2000-2fff : PCI Bus 0000:03 2000-20ff : 0000:03:00.0 3000-3fff : PCI Bus 0000:04 3000-30ff : 0000:04:00.0 3400-34ff : 0000:04:00.1 4000-5fff : PCI Bus #10 4000-4fff : PCI Bus 0000:11 4000-40ff : 0000:11:00.0 5000-5fff : PCI Bus 0000:12 5000-50ff : 0000:12:00.0 5400-54ff : 0000:12:00.1 6000-ffff : PCI Bus #00 # cat /proc/iomem 00000000-0000ffff : reserved 00010000-0009c7ff : System RAM 0009c800-0009ffff : reserved 000a0000-000bffff : PCI Bus #00 000d0000-000fffff : reserved 00100000-d7f3ffff : System RAM 01000000-01303b04 : Kernel code 01303b05-014d0d8f : Kernel data 0156f000-01680403 : Kernel bss 20000000-23ffffff : GART d7f40000-d7f53fff : ACPI Tables d7f54000-d7f7ffff : ACPI Non-volatile Storage d7f80000-d7ffffff : reserved d8000000-df0fffff : PCI Bus #00 d8000000-d81fffff : PCI Bus 0000:03 d8000000-d81fffff : 0000:03:00.0 d8200000-d82fffff : PCI Bus 0000:04 d8200000-d823ffff : 0000:04:00.0 d8240000-d827ffff : 0000:04:00.1 dd000000-ddffffff : 0000:00:05.0 de000000-de7fffff : 0000:00:05.0 dea00000-decfffff : PCI Bus 0000:03 dec00000-dec0ffff : 0000:03:00.0 dec00000-dec0ffff : mpt dec10000-dec13fff : 0000:03:00.0 dec10000-dec13fff : mpt ded00000-dedfffff : PCI Bus 0000:04 ded80000-ded80fff : 0000:04:00.0 ded80000-ded80fff : lpfc ded81000-ded81fff : 0000:04:00.1 ded81000-ded81fff : lpfc ded82000-ded820ff : 0000:04:00.0 ded82000-ded820ff : lpfc ded82400-ded824ff : 0000:04:00.1 ded82400-ded824ff : lpfc dee00000-deefffff : PCI Bus 0000:08 dee00000-deefffff : PCI Bus 0000:09 dee00000-dee0ffff : 0000:09:04.0 dee00000-dee0ffff : tg3 dee10000-dee1ffff : 0000:09:04.0 dee10000-dee1ffff : tg3 dee20000-dee2ffff : 0000:09:04.1 dee20000-dee2ffff : tg3 dee30000-dee3ffff : 0000:09:04.1 dee30000-dee3ffff : tg3 def00000-deffffff : PCI Bus 0000:0a def00000-deffffff : PCI Bus 0000:0b def00000-def0ffff : 0000:0b:04.0 def00000-def0ffff : tg3 def10000-def1ffff : 0000:0b:04.0 def10000-def1ffff : tg3 def20000-def2ffff : 0000:0b:04.1 def20000-def2ffff : tg3 def30000-def3ffff : 0000:0b:04.1 def30000-def3ffff : tg3 df000000-df003fff : 0000:00:05.0 df005000-df005fff : 0000:00:03.0 df005000-df005fff : ohci_hcd df006000-df006fff : 0000:00:03.1 df006000-df006fff : ohci_hcd df007000-df007fff : 0000:00:03.2 df007000-df007fff : ehci_hcd df100000-df8fffff : PCI Bus #10 df100000-df1fffff : PCI Bus 0000:12 df100000-df13ffff : 0000:12:00.0 df140000-df17ffff : 0000:12:00.1 df180000-df180fff : 0000:12:00.0 df180000-df180fff : lpfc df181000-df181fff : 0000:12:00.1 df181000-df181fff : lpfc df182000-df1820ff : 0000:12:00.0 df182000-df1820ff : lpfc df182400-df1824ff : 0000:12:00.1 df182400-df1824ff : lpfc df200000-df3fffff : PCI Bus 0000:11 df200000-df3fffff : 0000:11:00.0 df400000-df6fffff : PCI Bus 0000:11 df600000-df60ffff : 0000:11:00.0 df600000-df60ffff : mpt df610000-df613fff : 0000:11:00.0 df610000-df613fff : mpt df700000-df7fffff : PCI Bus 0000:16 df700000-df7fffff : PCI Bus 0000:17 df700000-df70ffff : 0000:17:04.0 df700000-df70ffff : tg3 df710000-df71ffff : 0000:17:04.0 df710000-df71ffff : tg3 df720000-df72ffff : 0000:17:04.1 df720000-df72ffff : tg3 df730000-df73ffff : 0000:17:04.1 df730000-df73ffff : tg3 df800000-df8fffff : PCI Bus 0000:18 df800000-df8fffff : PCI Bus 0000:19 df800000-df80ffff : 0000:19:04.0 df800000-df80ffff : tg3 df810000-df81ffff : 0000:19:04.0 df810000-df81ffff : tg3 df820000-df82ffff : 0000:19:04.1 df820000-df82ffff : tg3 df830000-df83ffff : 0000:19:04.1 df830000-df83ffff : tg3 df900000-dfffffff : PCI Bus #00 e0000000-efffffff : reserved e0000000-efffffff : pnp 00:09 e0000000-e18fffff : PCI MMCONFIG 0 [00-18] f0000000-fecfffff : PCI Bus #00 fec00000-fec01fff : reserved fec00000-fec00fff : IOAPIC 0 fec01000-fec01fff : IOAPIC 1 fed00000-ffffffff : PCI Bus #00 fed00000-fed003ff : HPET 0 fed00000-fed003ff : reserved fee00000-fee00fff : Local APIC fee00000-fee00fff : reserved fff80000-ffffffff : reserved 100000000-427ffffff : System RAM 428000000-fcffffffff : PCI Bus #00
We have had this problem again, below is the trace. Will this be taken care of or is the kernel too old to fix this? [521665.964452] BUG: unable to handle kernel paging request at 00000000c001fb06 [521665.964496] IP: [<ffffffff8111fdf0>] lease_get_mtime+0x14/0x4e [521665.964536] PGD 230e41067 PUD 0 [521665.964567] Oops: 0000 [#1] SMP [521665.964599] last sysfs file: /sys/devices/system/cpu/cpu15/topology/thread_siblings [521665.964653] CPU 0 [521665.964679] Modules linked in: ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_tcpudp kvm_amd kvm ip6table_filter ip6_tables iptable_filter ip_tables x_tables tun nfsd exportfs nfs lockd fscache nfs_acl auth_rpcgss sunrpc bridge stp bonding dm_round_robin dm_multipath scsi_dh loop snd_pcm snd_timer snd soundcore snd_page_alloc serio_raw tpm_tis tpm evdev psmouse tpm_bios pcspkr button container amd64_edac_mod i2c_piix4 edac_core edac_mce_amd shpchp processor i2c_core pci_hotplug ext3 jbd mbcache dm_mirror dm_region_hash dm_log dm_snapshot dm_mod sd_mod crc_t10dif mptsas mptscsih lpfc mptbase scsi_transport_fc scsi_transport_sas scsi_tgt tg3 ehci_hcd ohci_hcd libphy scsi_mod usbcore nls_base thermal fan thermal_sys [last unloaded: scsi_wait_scan] [521665.965190] Pid: 4282, comm: nfsd Not tainted 2.6.32.61vanilla #1 PRIMERGY BX630 S2 [521665.965246] RIP: 0010:[<ffffffff8111fdf0>] [<ffffffff8111fdf0>] lease_get_mtime+0x14/0x4e [521665.965302] RSP: 0018:ffff88042062dad0 EFLAGS: 00010202 [521665.965333] RAX: 00000000c001fad6 RBX: ffff88042062db28 RCX: 000000000000000c [521665.965385] RDX: ffff88042062daf0 RSI: ffff88042062db28 RDI: ffff88009b6a4f90 [521665.965436] RBP: ffff88012e480300 R08: 0000000000000000 R09: ffff88042662b610 [521665.965488] R10: 000000000fe00008 R11: ffffffff81153f18 R12: ffff88042062dba0 [521665.965540] R13: ffff88013f70dac4 R14: ffff88041a71c000 R15: ffff88013f70da80 [521665.965593] FS: 00007fedd7afd820(0000) GS:ffff88000fc00000(0000) knlGS:0000000000000000 [521665.965646] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b [521665.965678] CR2: 00000000c001fb06 CR3: 00000001f4deb000 CR4: 00000000000006f0 [521665.965730] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [521665.965782] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [521665.965834] Process nfsd (pid: 4282, threadinfo ffff88042062c000, task ffff88041498f000) [521665.968336] Stack: [521665.968336] ffff88042062dba0 ffff88013f70dac4 ffff88013f70dac8 ffffffffa03e9008 [521665.968336] <0> 0000000000870060 ffff81b00fe00008 000003e900000001 00000000000003e9 [521665.968336] <0> 00000000000a5b69 00000000502f8d66 0000000000000000 000000005024d4b3 [521665.968336] Call Trace: [521665.968336] [<ffffffffa03e9008>] ? encode_post_op_attr+0x5a/0x84 [nfsd] [521665.968336] [<ffffffffa03e9621>] ? encode_entryplus_baggage+0x11f/0x151 [nfsd] [521665.968336] [<ffffffffa018eb62>] ? ext3_htree_fill_tree+0x1c3/0x1e5 [ext3] [521665.968336] [<ffffffffa03e97b8>] ? encode_entry+0x165/0x31a [nfsd] [521665.968336] [<ffffffffa03e997d>] ? nfs3svc_encode_entry_plus+0x10/0x13 [nfsd] [521665.968336] [<ffffffffa03e2168>] ? nfsd_readdir+0x11d/0x1b5 [nfsd] [521665.968336] [<ffffffffa0316106>] ? unix_gid_request+0x0/0x6b [sunrpc] [521665.968336] [<ffffffffa03e996d>] ? nfs3svc_encode_entry_plus+0x0/0x13 [nfsd] [521665.968336] [<ffffffffa03e7e8b>] ? nfsd3_proc_readdirplus+0xd5/0x1b9 [nfsd] [521665.968336] [<ffffffffa03dd329>] ? nfsd_dispatch+0xdd/0x1b9 [nfsd] [521665.968336] [<ffffffffa0312527>] ? svc_process+0x403/0x627 [sunrpc] [521665.968336] [<ffffffffa03dd772>] ? nfsd+0x0/0x12e [nfsd] [521665.968336] [<ffffffffa03dd857>] ? nfsd+0xe5/0x12e [nfsd] [521665.968336] [<ffffffff81064f11>] ? kthread+0x79/0x81 [521665.968336] [<ffffffff81011baa>] ? child_rip+0xa/0x20 [521665.968336] [<ffffffff81064e98>] ? kthread+0x0/0x81 [521665.968336] [<ffffffff81011ba0>] ? child_rip+0x0/0x20 [521665.968336] Code: e6 48 89 df e8 4b fd ff ff 89 c3 e8 84 dd 1d 00 89 d8 5b 5d 41 5c c3 53 48 89 f3 48 83 ec 10 48 8b 87 10 01 00 00 48 85 c0 74 21 <f6> 40 30 20 74 1b f6 40 31 01 74 15 48 8b bf 08 01 00 00 e8 3b [521665.968336] RIP [<ffffffff8111fdf0>] lease_get_mtime+0x14/0x4e [521665.968336] RSP <ffff88042062dad0> [521665.968336] CR2: 00000000c001fb06 [521665.973315] ---[ end trace b2a1bd8deb6dc0f0 ]---
Way too old for upstream to care. You might want to run a memory tester on the box before assuming kernel as the crashes look fairly random.
Thanks for your feedback. Memory tester was run but with no problem discovered. Not yet upgraded to newer kernel due to this: https://bugzilla.kernel.org/show_bug.cgi?id=74011