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SubjectRe: 2.4.0 vm BUG (ksymoopsed)
2.4.0 (final i586) patched with reiserfs 3.6.25 produced the following BUG:


the console report (ksymoopsed):

kernel BUG at vmscan.c:452!
invalid operand: 0000
CPU: 0
EIP: 0010:[<c01260fd>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010282
eax: 0000001c ebx: c101322c ecx: c0274608 edx: 00000000
esi: c23acc24 edi: c1013210 ebp: 000000ef esp: c23d9c80
ds: 0018 es: 0018 ss: 0018
Process bash (pid: 340, stackpage=c23d9000)
Stack: c0225a73 c0225c12 000001c4 c02757a0 c0275a0c 00000001 00000000 c0127a28
c02757a0 00000000 c0275a10 00000000 00008038 c0127b9d c0275a04 00000000
00000001 00000001 00000000 00001000 00000000 00008038 00000003 00000001
Call Trace: [<c0127a28>] [<c0127b9d>] [<c012f8e2>] [<c012da24>] [<c012da31>] [<c012de12>] [<c012e022>]
[<c0184a5b>] [<c0180b2d>] [<c01748d9>] [<c013eacb>] [<c013ecf6>] [<c0174950>] [<c0171351>] [<c0135dcb>]
[<c0136199>] [<c0136acc>] [<c0133786>] [<c0108e73>]
Code: 0f 0b 83 c4 0c 31 c0 0f b3 47 18 19 c0 85 c0 75 19 68 c5 01

>>EIP; c01260fd <reclaim_page+3a9/41c> <=====
Trace; c0127a28 <__alloc_pages_limit+7c/ac>
Trace; c0127b9d <__alloc_pages+145/2e0>
Trace; c012f8e2 <grow_buffers+3e/16c>
Trace; c012da24 <refill_freelist+1c/30>
Trace; c012da31 <refill_freelist+29/30>
Trace; c012de12 <getblk+f2/108>
Trace; c012e022 <bread+1a/68>
Trace; c0184a5b <reiserfs_bread+17/1c>
Trace; c0180b2d <search_by_key+75/c80>
Trace; c01748d9 <reiserfs_read_inode2+75/c8>
Trace; c013eacb <get_new_inode+c3/158>
Trace; c013ecf6 <iget4+ba/cc>
Trace; c0174950 <reiserfs_iget+24/64>
Trace; c0171351 <reiserfs_lookup+9d/d8>
Trace; c0135dcb <real_lookup+53/c4>
Trace; c0136199 <path_walk+225/7ac>
Trace; c0136acc <__user_walk+3c/58>
Trace; c0133786 <sys_newstat+16/70>
Trace; c0108e73 <system_call+33/40>
Code; c01260fd <reclaim_page+3a9/41c>
00000000 <_EIP>:
Code; c01260fd <reclaim_page+3a9/41c> <=====
0: 0f 0b ud2a <=====
Code; c01260ff <reclaim_page+3ab/41c>
2: 83 c4 0c add $0xc,%esp
Code; c0126102 <reclaim_page+3ae/41c>
5: 31 c0 xor %eax,%eax
Code; c0126104 <reclaim_page+3b0/41c>
7: 0f b3 47 18 btr %eax,0x18(%edi)
Code; c0126108 <reclaim_page+3b4/41c>
b: 19 c0 sbb %eax,%eax
Code; c012610a <reclaim_page+3b6/41c>
d: 85 c0 test %eax,%eax
Code; c012610c <reclaim_page+3b8/41c>
f: 75 19 jne 2a <_EIP+0x2a> c0126127 <reclaim_page+3d3/41c>
Code; c012610e <reclaim_page+3ba/41c>
11: 68 c5 01 00 00 push $0x1c5

In /var/log/kernlog, this incident was reported as follows:
Jan 10 22:14:54 kernel: kernel BUG at page_alloc.c:74!
Jan 10 22:14:54 kernel: invalid operand: 0000

So long.
Ulrich

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