J.A. Magallon writes:
> Hi...
>
> I have just built 2.6.12-rc2-mm3 with gcc4 final. I got this couple oopses on boot.
...
> Apr 27 15:52:44 werewolf kernel: Unable to handle kernel paging request at virtual address 10a316b4
> Apr 27 15:52:44 werewolf kernel: b011f5d5
> Apr 27 15:52:44 werewolf kernel: *pde = 00000000
> Apr 27 15:52:44 werewolf kernel: Oops: 0002 [#1]
> Apr 27 15:52:44 werewolf kernel: CPU: 0
> Apr 27 15:52:44 werewolf kernel: EIP: 0060:[do_proc_dointvec_conv+15/58] Not tainted VLI
> Apr 27 15:52:44 werewolf kernel: EIP: 0060:[<b011f5d5>] Not tainted VLI
> Using defaults from ksymoops -t elf32-i386 -a i386
> Apr 27 15:52:44 werewolf kernel: EFLAGS: 00010246 (2.6.11-jam14)
> Apr 27 15:52:44 werewolf kernel: eax: 00000000 ebx: 00000001 ecx: 10a316b4 edx: ef4eef1c
> Apr 27 15:52:44 werewolf kernel: esi: a7f5f001 edi: ef4eef03 ebp: 00000001 esp: ef4eeedc
> Apr 27 15:52:44 werewolf kernel: ds: 007b es: 007b ss: 0068
> Apr 27 15:52:44 werewolf kernel: Stack: b011f8b2 00000001 00000000 00000001 eed6332c 10a316b4 00000001 00000001
> Apr 27 15:52:44 werewolf kernel: 00000000 30000000 0000000a ef4eefbc ef507550 a7f5f000 00000001 ef4eef04
> Apr 27 15:52:44 werewolf kernel: 00000000 00000000 a7f5f000 a7f5f000 00000001 efd9e8e0 b011f95c a7f5f000
> Apr 27 15:52:44 werewolf kernel: Call Trace:
> Apr 27 15:52:44 werewolf kernel: [<b011f8b2>] do_proc_dointvec+0x2b2/0x32c
> Apr 27 15:52:44 werewolf kernel: [<b011f95c>] proc_dointvec+0x30/0x35
> Apr 27 15:52:44 werewolf kernel: [<b011f5c6>] do_proc_dointvec_conv+0x0/0x3a
> Apr 27 15:52:44 werewolf kernel: [<b011f311>] do_rw_proc+0x78/0x84
> Apr 27 15:52:44 werewolf kernel: [<b011f354>] proc_writesys+0x0/0x24
> Apr 27 15:52:44 werewolf kernel: [<b011f373>] proc_writesys+0x1f/0x24
> Apr 27 15:52:44 werewolf kernel: [<b0152032>] vfs_write+0x89/0x12a
> Apr 27 15:52:44 werewolf kernel: [<b015217e>] sys_write+0x41/0x6a
> Apr 27 15:52:44 werewolf kernel: [<b0102993>] sysenter_past_esp+0x54/0x75
> Apr 27 15:52:44 werewolf kernel: Code: c1 89 d8 ba ff ff 00 00 f0 0f c1 10 0f 85 9a 12 00 00 89 c8 83 c4 0c 5b 5e 5f 5d c3 83 7c 24 04 00 74 0d 8b 00 85 c0 75 18 8b 02 <89> 01 31 c0 c3 8b 09 85 c9 78 13 c7 00 00 00 00 00 89 0a 31 c0
Old news :-) See:
http://marc.theaimsgroup.com/?l=linux-kernel&m=111425013208085&w=2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21173
To fix the bug, apply this patch to gcc-4.0.0 final:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-pre.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=2.65.4.2&r2=2.65.4.3
/Mikael
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