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Subject[Bug 2219] New: kernel BUG at mm/rmap.c:306
http://bugme.osdl.org/show_bug.cgi?id=2219

Summary: kernel BUG at mm/rmap.c:306
Kernel Version: 2.6.3
Status: NEW
Severity: high
Owner: akpm@digeo.com
Submitter: castetm@ensimag.imag.fr


Distribution: gentoo
Hardware Environment:pentium-3/512 Mo RAM

I have try overcommit-accounting with strict overcommit, but when i launch a
program like [1], there was a kernel bug [2]


[1]
int main()
{
while(fork() != -1) {}
while(malloc(1024)) {}
while(1) {}
}
------------------------------------------------
[2]
Out of Memory: Killed process 8289 (a.out).
Out of Memory: Killed process 8297 (a.out).
swap_free: Bad swap offset entry 001c2790
------------[ cut here ]------------
kernel BUG at mm/rmap.c:306!
invalid operand: 0000 [#1]
CPU: 0
EIP: 0060:[<c014baf0>] Not tainted
EFLAGS: 00010246
EIP is at try_to_unmap_one+0x1e0/0x1f0
eax: 00000000 ebx: 000c0000 ecx: 00000009 edx: c1000000
esi: c14662e8 edi: df55e300 ebp: c14662e8 esp: dfa99d48
ds: 007b es: 007b ss: 0068
Process kswapd0 (pid: 8, threadinfo=dfa98000 task=dfa9eca0)
Stack: df55e300 00000009 1c279005 00000000 00000000 00000004 c14662e8 da675ac0
00000000 c014bbab d4a5d440 00000004 00000000 da675ac0 00000000 c14662e8
00000001 dfa98000 c0142554 c1416c20 dfa99db8 c036a6f4 dfa98000 00000028
Call Trace:
[<c014bbab>] try_to_unmap+0xab/0x160
[<c0142554>] shrink_list+0x224/0x560
[<c0142a30>] shrink_cache+0x1a0/0x320
[<c0143243>] shrink_zone+0x83/0xb0
[<c014365a>] balance_pgdat+0x19a/0x220
[<c01437f5>] kswapd+0x115/0x130
[<c011d7e0>] autoremove_wake_function+0x0/0x50
[<c0109302>] ret_from_fork+0x6/0x14
[<c011d7e0>] autoremove_wake_function+0x0/0x50
[<c01436e0>] kswapd+0x0/0x130
[<c01072a5>] kernel_thread_helper+0x5/0x10
Code: 0f 0b 32 01 13 c0 32 c0 e9 78 fe ff ff 8d 76 00 55 57 56 89
<6>note: kswapd0[8] exited with preempt_count 2
Out of Memory: Killed process 12353 (a.out).


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