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Date: Thu, 10 Jul 2008 15:33:30 +0200 From: "Vegard Nossum" <vegard.nossum@...il.com> To: "Dmitry Adamushko" <dmitry.adamushko@...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, "Pekka Enberg" <penberg@...helsinki.fi> Subject: Re: v2.6.26-rc9: kernel BUG at kernel/sched.c:5858! On Thu, Jul 10, 2008 at 3:17 PM, Vegard Nossum <vegard.nossum@...il.com> wrote: > On Thu, Jul 10, 2008 at 3:04 PM, Vegard Nossum <vegard.nossum@...il.com> wrote: >>> 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 >> >> Yep, it does, nice, thanks! > > I got something else now though: > > Oops: 0002 [#1] PREEMPT SMP DEBUG_PAGEALLOC > Pid: 19762, comm: grep Not tainted (2.6.26-rc9-00059-gb190333 #5) > EIP: 0060:[<c01991c7>] EFLAGS: 00210203 CPU: 0 > EIP is at kmem_cache_alloc+0xc7/0xe0 $ addr2line -e vmlinux -i c01991c7 include/asm/string_32.h:183 mm/slub.c:1646 For reference, the disassembly: c01991c7: f3 ab rep stos %eax,%es:(%edi) and registers in question: ESI: 00200282 EDI: f6c44000 EBP: e7c2befc ESP: e7c2bedc DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 ...though yet another run gets me this: BUG: unable to handle kernel NULL pointer dereference at 00000000 IP: [<00000000>] *pde = 00000000 Oops: 0000 [#2] PREEMPT SMP DEBUG_PAGEALLOC Pid: 3883, comm: cat Tainted: G D (2.6.26-rc9-00059-gb190333 #5) EIP: 0060:[<00000000>] EFLAGS: 00210286 CPU: 0 EIP is at 0x0 EAX: f7890400 EBX: 00000000 ECX: 00000102 EDX: 0175d000 ESI: f7890400 EDI: c07feda0 EBP: f0461e6c ESP: f0461e58 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 Process cat (pid: 3883, ti=f0460000 task=f1891fe0 task.ti=f0460000) Stack: c0172d0c 00200296 c0752b40 00000001 0000000a f0461e88 c0139e03 c0803d00 c0803d00 c0803d00 00200046 c0298720 f0461e98 c0139f25 c0803d00 00000000 f0461ea4 c013a0c5 c1f12140 f0461ebc c011a4a8 c1f60f00 f0461f0c 00000000 Call Trace: [<c0172d0c>] ? rcu_process_callbacks+0x6c/0xb0 [<c0139e03>] ? __do_softirq+0x83/0x100 [<c0298720>] ? __rdmsr_safe_on_cpu+0x0/0x60 [<c0139f25>] ? do_softirq+0xa5/0xb0 [<c013a0c5>] ? irq_exit+0x95/0xa0 [<c011a4a8>] ? smp_apic_timer_interrupt+0x58/0x90 [<c01058a3>] ? apic_timer_interrupt+0x33/0x38 [<c0298720>] ? __rdmsr_safe_on_cpu+0x0/0x60 [<c01196e1>] ? smp_call_function_single+0x91/0xc0 [<c029888f>] ? _rdmsr_on_cpu+0x2f/0x70 [<c02988ea>] ? rdmsr_safe_on_cpu+0x1a/0x20 [<c01179fe>] ? msr_read+0x6e/0xa0 [<c019eec4>] ? vfs_read+0x94/0x130 [<c0117990>] ? msr_read+0x0/0xa0 [<c019f3ed>] ? sys_read+0x3d/0x70 [<c0104ceb>] ? sysenter_past_esp+0x78/0xd1 ======================= Code: Bad EIP value. EIP: [<00000000>] 0x0 SS:ESP 0068:f0461e58 Kernel panic - not syncing: Fatal exception in interrupt :-) Vegard -- "The animistic metaphor of the bug that maliciously sneaked in while the programmer was not looking is intellectually dishonest as it disguises that the error is the programmer's own creation." -- E. W. Dijkstra, EWD1036 -- 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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