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SubjectRe: 2.5.34-mm2 kernel BUG at sched.c:944! only with CONFIG_PREEMPT=y
On 12 Sep 2002 08:14:01 -0600
Steven Cole <elenstev@mesatop.com> escribió:

> I got the following BUG at sched.c:944! with 2.5.34-mm2 and PREEMPT on.
> This was repeatable.

Same for me:
POSIX conformance testing by UNIFIX
Kernel BUG at sched.c:944!

preempt, no smp, HUGETLB_PAGE

a cyrix 6x86MX 233+ with 32 MB of ram...

>
> With no PREEMPT, 2.5.34-mm2 booted and is running fine. Some other
> options used: SMP, HUGETLB_PAGE, HIGHPTE, HIGHMEM4G.
>
> System is dual p3, scsi, 1GB.
>
> Steven
>
> ksymoops 2.4.4 on i686 2.5.34. Options used
> -v vmlinux (specified)
> -K (specified)
> -L (specified)
> -O (specified)
> -m System.map (specified)
>
> kernel BUG at sched.c:944!
> invalid operand: 0000
> CPU: 0
> EIP: 0060:[<c01176ff>] Not tainted
> Using defaults from ksymoops -t elf32-i386 -a i386
> EFLAGS: 00010206
> eax: c02d4000 ebx: c02d4000 ecx: 00000000 edx: 00000000
> esi: 0009b800 edi: c0105000 ebp: c02d5c8 esp: c02d5fa8
> ds: 068 es: 0068 ss: 0068
> Stack: c01072c4 00000060 00000286 00000000 00000000 c02d4000 0009b800 c0105000
> c02d5fd4 c0117ad6 00000000 0008e000 c010504b c02d68c2 c02ba3a0 00000000
> c027e980 0003fff0 0003fff0 c033e660 00000002 c01001b1
> Call Trace: [<c01072c4>] [<c0105000>] [<c0117ad6>] [<c010504b>]
> Code: 0f 0b b0 03 5f 52 28 c0 b9 00 e0 ff ff 21 e1 ff 41 10 9b 01
>
> >>EIP; c01176ff <schedule+1f/3c0> <=====
> Trace; c01072c4 <kernel_thread_helper+0/c>
> Trace; c0105000 <_stext+0/0>
> Trace; c0117ad6 <preempt_schedule+36/50>
> Trace; c010504b <rest_init+4b/50>
> Code; c01176ff <schedule+1f/3c0>
> 00000000 <_EIP>:
> Code; c01176ff <schedule+1f/3c0> <=====
> 0: 0f 0b ud2a <=====
> Code; c0117701 <schedule+21/3c0>
> 2: b0 03 mov $0x3,%al
> Code; c0117703 <schedule+23/3c0>
> 4: 5f pop %edi
> Code; c0117704 <schedule+24/3c0>
> 5: 52 push %edx
> Code; c0117705 <schedule+25/3c0>
> 6: 28 c0 sub %al,%al
> Code; c0117707 <schedule+27/3c0>
> 8: b9 00 e0 ff ff mov $0xffffe000,%ecx
> Code; c011770c <schedule+2c/3c0>
> d: 21 e1 and %esp,%ecx
> Code; c011770e <schedule+2e/3c0>
> f: ff 41 10 incl 0x10(%ecx)
> Code; c0117711 <schedule+31/3c0>
> 12: 9b fwait
> Code; c0117712 <schedule+32/3c0>
> 13: 01 00 add %eax,(%eax)
>
> <0>Kernel panic: Attempted to kill the idle task!
>
>
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