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Date: Thu, 10 Jul 2008 14:50:11 +0200 From: "Dmitry Adamushko" <dmitry.adamushko@...il.com> To: "Vegard Nossum" <vegard.nossum@...il.com> Cc: Yanmin <yanmin_zhang@...ux.intel.com>, "Rusty Russell" <rusty@...tcorp.com.au>, "Ingo Molnar" <mingo@...e.hu>, "Peter Zijlstra" <a.p.zijlstra@...llo.nl>, "Dhaval Giani" <dhaval@...ux.vnet.ibm.com>, "Gautham R Shenoy" <ego@...ibm.com>, "Heiko Carstens" <heiko.carstens@...ibm.com>, miaox@...fujitsu.com, "Lai Jiangshan" <laijs@...fujitsu.com>, "Avi Kivity" <avi@...ranet.com>, linux-kernel@...r.kernel.org Subject: Re: v2.6.26-rc9: kernel BUG at kernel/sched.c:5858! 2008/7/10 Vegard Nossum <vegard.nossum@...il.com>: > On Thu, Jul 10, 2008 at 1:59 PM, Vegard Nossum <vegard.nossum@...il.com> wrote: >> Hi, >> >> Looks like CPU hotplug still has some problems. Just got this on >> latest mainline, and I couldn't find the exact same report on LKML >> or kerneloops, maybe it can be helpful for debugging the existing >> problem(s)? >> >> lockdep: fixing up alternatives. >> ------------[ cut here ]------------ >> kernel BUG at kernel/sched.c:5858! >> invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC >> Pid: 3934, comm: bash Not tainted (2.6.26-rc9-00057-g60d678c #3) >> EIP: 0060:[<c057f7c5>] EFLAGS: 00210046 CPU: 0 >> EIP is at migration_call+0x495/0x4d0 >> EAX: 00000000 EBX: c0803f00 ECX: f6bd0000 EDX: 017b0000 >> ESI: e7d24fb0 EDI: c1fb3f00 EBP: f62e7e78 ESP: f62e7e48 >> DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 >> Process bash (pid: 3934, ti=f62e6000 task=f60fbfc0 task.ti=f62e6000) >> Stack: 00000000 c06ddf70 f62e7e6c 00200246 c0803f00 00000001 c1fb3f00 f62e7e6c >> c0581fcf c074ec70 ffffffff 00000000 f62e7e98 c014d5a7 00000001 00000007 >> c074ecf4 ffffffff 00000001 e7c86f90 f62e7eac c014d619 ffffffff 00000000 >> Call Trace: >> [<c0581fcf>] ? preempt_schedule+0x3f/0x50 >> [<c014d5a7>] ? notifier_call_chain+0x37/0x70 >> [<c014d619>] ? __raw_notifier_call_chain+0x19/0x20 >> [<c014d63a>] ? raw_notifier_call_chain+0x1a/0x20 >> [<c055ff68>] ? _cpu_down+0x148/0x240 >> [<c015da8f>] ? cpu_maps_update_begin+0xf/0x20 >> [<c056008b>] ? cpu_down+0x2b/0x40 >> [<c05612a9>] ? store_online+0x39/0x80 >> [<c0561270>] ? store_online+0x0/0x80 >> [<c02fba7b>] ? sysdev_store+0x2b/0x40 >> [<c01dd0f2>] ? sysfs_write_file+0xa2/0x100 >> [<c019ed76>] ? vfs_write+0x96/0x130 >> [<c01dd050>] ? sysfs_write_file+0x0/0x100 >> [<c019f43d>] ? sys_write+0x3d/0x70 >> [<c0104ceb>] ? sysenter_past_esp+0x78/0xd1 >> ======================= >> Code: 45 e8 e8 2f 53 00 00 b8 01 00 00 00 e9 a2 fb ff ff bb 60 36 59 c0 eb 02 8b >> 1b 89 f8 ff 53 18 85 c0 89 c6 74 f3 90 e9 89 fe ff ff <0f> 0b eb fe 8d b4 26 00 >> 00 00 00 e8 8b 82 bd ff 89 f0 50 9d 0f >> EIP: [<c057f7c5>] migration_call+0x495/0x4d0 SS:ESP 0068:f62e7e48 >> >> >> Oh, I just saw >> >> commit dc7fab8b3bb388c57c6c4a43ba68c8a32ca25204 >> Author: Dmitry Adamushko <dmitry.adamushko@...il.com> >> Date: Thu Jul 10 00:32:40 2008 +0200 >> >> sched: fix cpu hotplug >> >> will apply and retry. Is this likely to fix the oops I saw, though? > > Nope, I get the same thing (just 2 lines offset): No, it shouldn't fix this particular problem. Does a patch from Miao Xie available via the link below makes this problem disappear? Both bugs are likely to have the same cause. http://lkml.org/lkml/2008/7/7/75 -- Best regards, Dmitry Adamushko -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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