Latest working kernel version: 2.6.22? Earliest failing kernel version: unk Distribution: Debian testing Hardware Environment: HP Compaq 6910p, Core2Duo Software Environment: Debian testing, vanilla 2.6.25.6, i386 kernel Problem Description: kernel freezes doing echo 0 > /sys/devices/system/cpu/cpu1/online Everythink is ok, I see only 1 cpu in /proc/cpuinfo echo 1 > /sys/devices/system/cpu/cpu1/online Immeditial freeze! Steps to reproduce: Write commands
Same error with 2.6.26
Hi Cijoml, I tested here and can't reproduce freeze as commented by you. Distribution: Debian Lenny Hardware Environment: Lenovo 3000 V200 # uname -a Linux mandachuva 2.6.24-1-686 #1 SMP Thu May 8 02:16:39 UTC 2008 i686 GNU/Linux # cat /proc/cpuinfo | grep 'model name' model name : Intel(R) Core(TM)2 Duo CPU T7100 @ 1.80GHz model name : Intel(R) Core(TM)2 Duo CPU T7100 @ 1.80GHz I turn-off and turn-on CPU1 as commented by you and my laptop don't freeze. Best regards, Renato S. Yamane Brazil
Cijoml, can you please provide a full boot log (dmesg output) of your machine. Also can you please switch to a text terminal (Alt+F1) and do the online/offline there so you can see whether there is some output from the kernel.
Hello, I will provide it later, but what is strange I see there: Misrouted IRQ fixup and polling support enabled This may significantly impact system performance Michal
Created attachment 17019 [details] dmidecode_HP_Compaq_6910p_BIOS_F14 dmidecode_HP_Compaq_6910p_BIOS_F14
Created attachment 17020 [details] dmesg-HP_Compaq_6910p_2.6.26_BIOS_F14 dmesg-HP_Compaq_6910p_2.6.26_BIOS_F14
> Misrouted IRQ fixup and polling support enabled > This may significantly impact system performance This due to: Kernel command line: BOOT_IMAGE=Linux ro root=803 irqpoll Can you please remove the irqpoll option from the kernel commandline ?
I could, but then I get OOSPs asking me to switch it on (MMC/SD card reader)
http://bugzilla.kernel.org/show_bug.cgi?id=10916 This one
well, the question is whether _this_ problem goes away when you remove irqpoll The nobody cared interrupt is a separate issue.
Well I tried without irqpoll, but I also hit the bug...
Seems fixed in 2.6.27.5