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Date: Fri, 13 Sep 2002 22:41:39 +0200
From: Arador <diegocg@teleline.es>
To: Steven Cole <elenstev@mesatop.com>
Cc: akpm@zip.com.au, linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: 2.5.34-mm2 kernel BUG at sched.c:944! only with CONFIG_PREEMPT=y
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On 12 Sep 2002 08:14:01 -0600
Steven Cole <elenstev@mesatop.com> escribi?:

> 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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