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Date: Mon, 12 Jul 2004 15:38:19 -0300
From: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
To: Jan Rychter <jan@rychter.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.4.26: kernel BUG at page_alloc.c:235\
Message-ID: <20040712183819.GA5059@logos.cnet>
References: <m23c3wzacq.fsf@tnuctip.rychter.com>
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On Mon, Jul 12, 2004 at 11:31:49PM -0700, Jan Rychter wrote:
> Linux 2.4.26 compiled with gcc-2.96 20000731 (RH7.1 2.96-85), running on
> an Athlon XP2200+ clocked at 1800MHz.
> 
> Any ideas?

Hi Jan,

The BUG() is at rmqueue(), "if (PageLRU(page)) BUG".

The same BUG has been seen before. The BUG means an LRU page was found in a zone's free list
(this is not a valid thing to happen).

This could be either a driver bug (which uses a page after freeing it, as wli smartly pointed
out at the time) or faulty hardware, as it showed to be in that occasion.

What drivers are you using and, just as matter of "safety", have you ran 
memtest on this box?

> --J.
> 
> Jul 11 11:03:26 screech kernel: kernel BUG at page_alloc.c:235!
> Jul 11 11:03:26 screech kernel: invalid operand: 0000
> Jul 11 11:03:26 screech kernel: CPU:    0
> Jul 11 11:03:26 screech kernel: EIP:    0010:[<c012f69e>]    Not tainted
> Using defaults from ksymoops -t elf32-i386 -a i386
> Jul 11 11:03:26 screech kernel: EFLAGS: 00010202
> Jul 11 11:03:26 screech kernel: eax: 00000040   ebx: c125ca44   ecx: 00001000   edx: 0000dbde
> Jul 11 11:03:26 screech kernel: esi: c02b86b8   edi: 00000001   ebp: 00000000   esp: d062be68
> Jul 11 11:03:26 screech kernel: ds: 0018   es: 0018   ss: 0018
> Jul 11 11:03:26 screech kernel: Process imapd (pid: 31910, stackpage=d062b000)
> Jul 11 11:03:26 screech kernel: Stack: 00001000 0000cbde 00000282 00000000 c02b86b8 c02b888c 00000001 0000000c 
> Jul 11 11:03:26 screech kernel:        00000001 c012f964 c02b86b8 c012e0b5 c125ca70 00000001 c02b86b8 c02b8888 
> Jul 11 11:03:26 screech kernel:        00000000 000001d2 c125ca70 cffb3b34 00000010 00007637 df68c1a8 c0127cf1 
> Jul 11 11:03:26 screech kernel: Call Trace:    [<c012f964>] [<c012e0b5>] [<c0127cf1>] [<c0128367>] [<c01285b8>]
> Jul 11 11:03:26 screech kernel:   [<c0128bc6>] [<c0128ac0>] [<c0135975>] [<c0135640>] [<c01357ee>] [<c01086a3>]
> Jul 11 11:03:26 screech kernel: Code: 0f 0b eb 00 73 ff 26 c0 8b 43 18 a9 80 00 00 00 74 08 0f 0b 
> 
> >>EIP; c012f69e <rmqueue+1fe/240>   <=====
> Trace; c012f964 <__alloc_pages+74/2c0>
> Trace; c012e0b5 <lru_cache_add+65/70>
> Trace; c0127cf1 <page_cache_read+61/b0>
> Trace; c0128367 <generic_file_readahead+117/150>
> Trace; c01285b8 <do_generic_file_read+1d8/450>
> Trace; c0128bc6 <generic_file_read+86/160>
> Trace; c0128ac0 <file_read_actor+0/80>
> Trace; c0135975 <sys_read+95/f0>
> Trace; c0135640 <generic_file_llseek+0/b0>
> Trace; c01357ee <sys_lseek+6e/80>
> Trace; c01086a3 <system_call+33/38>
> Code;  c012f69e <rmqueue+1fe/240>
> 00000000 <_EIP>:
> Code;  c012f69e <rmqueue+1fe/240>   <=====
>    0:   0f 0b                     ud2a      <=====
> Code;  c012f6a0 <rmqueue+200/240>
>    2:   eb 00                     jmp    4 <_EIP+0x4> c012f6a2 <rmqueue+202/240>
> Code;  c012f6a2 <rmqueue+202/240>
>    4:   73 ff                     jae    5 <_EIP+0x5> c012f6a3 <rmqueue+203/240>
> Code;  c012f6a4 <rmqueue+204/240>
>    6:   26 c0 8b 43 18 a9 80      rorb   $0x0,%es:0x80a91843(%ebx)
> Code;  c012f6ab <rmqueue+20b/240>
>    d:   00 
> Code;  c012f6ac <rmqueue+20c/240>
>    e:   00 00                     add    %al,(%eax)
> Code;  c012f6ae <rmqueue+20e/240>
>   10:   74 08                     je     1a <_EIP+0x1a> c012f6b8 <rmqueue+218/240>
> Code;  c012f6b0 <rmqueue+210/240>
>   12:   0f 0b                     ud2a   
> 
> Jul 11 11:03:29 screech kernel:  kernel BUG at page_alloc.c:235!
> Jul 11 11:03:29 screech kernel: invalid operand: 0000
> Jul 11 11:03:29 screech kernel: CPU:    0
> Jul 11 11:03:29 screech kernel: EIP:    0010:[<c012f69e>]    Not tainted
> Jul 11 11:03:29 screech kernel: EFLAGS: 00010202
> Jul 11 11:03:29 screech kernel: eax: 00000040   ebx: c128cc18   ecx: 00001000   edx: 0000ed5d
> Jul 11 11:03:29 screech kernel: esi: c02b86b8   edi: 00000001   ebp: 00000000   esp: d062be40
> Jul 11 11:03:29 screech kernel: ds: 0018   es: 0018   ss: 0018
> Jul 11 11:03:29 screech kernel: Process imapd (pid: 31916, stackpage=d062b000)
> Jul 11 11:03:29 screech kernel: Stack: 00001000 0000dd5d 00000282 00000000 c02b86b8 c02b888c 00000001 0000000c 
> Jul 11 11:03:29 screech kernel:        00000001 c012f964 c02b86b8 db31f7c0 ce38d8c0 ce38d8c0 c02b86b8 c02b8888 
> Jul 11 11:03:29 screech kernel:        00000000 000001d2 ce38dd40 c138f4f4 00000001 ce38dd40 db9c98c0 c012590d 
> Jul 11 11:03:29 screech kernel: Call Trace:    [<c012f964>] [<c012590d>] [<c0125eb4>] [<c0125a58>] [<c01264af>]
> Jul 11 11:03:29 screech kernel:   [<c0114806>] [<c010d45a>] [<c012b48d>] [<c013550d>] [<c0114690>] [<c0108794>]
> Jul 11 11:03:29 screech kernel: Code: 0f 0b eb 00 73 ff 26 c0 8b 43 18 a9 80 00 00 00 74 08 0f 0b