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Subject2.6.8-rc2 crashes
Date
Greetings everybody;

I have now had 4 crashes while running 2.6.8-rc2, the last one
requiring a full powerdown before the intel-8x0 could
re-establish control over the sound.

All have had an initial Opps located in prune_dcache, and were
logged as follows:
Jul 27 07:58:58 coyote kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000000
Jul 27 07:58:58 coyote kernel: printing eip:
Jul 27 07:58:58 coyote kernel: c0164376
Jul 27 07:58:58 coyote kernel: *pde = 00000000
Jul 27 07:58:58 coyote kernel: Oops: 0002 [#1]
Jul 27 07:58:58 coyote kernel: PREEMPT
Jul 27 07:58:58 coyote kernel: Modules linked in: tuner tvaudio bttv video_buf btcx_risc eeprom snd_seq_oss snd_seq
_midi_event snd_seq snd_pcm_oss snd_mixer_oss snd_bt87x snd_intel8x0 snd_ac97_codec snd_pcm snd_timer snd_page_allo
c snd_mpu401_uart snd_rawmidi snd_seq_device snd forcedeth sg
Jul 27 07:58:58 coyote kernel: CPU: 0
Jul 27 07:58:58 coyote kernel: EIP: 0060:[<c0164376>] Not tainted
Jul 27 07:58:58 coyote kernel: EFLAGS: 00010216 (2.6.8-rc2-nf2)
Jul 27 07:58:58 coyote kernel: EIP is at prune_dcache+0x36/0x1c0
Jul 27 07:58:58 coyote kernel: eax: c03706f8 ebx: dbbf1090 ecx: dbbf5c34 edx: 00000000
Jul 27 07:58:58 coyote kernel: esi: ed1f8990 edi: c1989000 ebp: 0000001e esp: c1989ef8
Jul 27 07:58:58 coyote kernel: ds: 007b es: 007b ss: 0068
Jul 27 07:58:58 coyote kernel: Process kswapd0 (pid: 66, threadinfo=c1989000 task=c1978050)
Jul 27 07:58:58 coyote kernel: Stack: ed1f8990 c1989ef8 0000002a 00000000 c1989000 f7ffea20 c016491f 0000002a
Jul 27 07:58:58 coyote kernel: c013ab6b 0000002a 000000d0 0001df9e 022f2e00 00000000 0000012a 00000000
Jul 27 07:58:58 coyote kernel: c036f6e4 00000002 00000007 c036f5c0 c013bf11 00000020 000000d0 00000000
Jul 27 07:58:58 coyote kernel: Call Trace:
Jul 27 07:58:58 coyote kernel: [<c016491f>] shrink_dcache_memory+0x1f/0x50
Jul 27 07:58:58 coyote kernel: [<c013ab6b>] shrink_slab+0x14b/0x190
Jul 27 07:58:58 coyote kernel: [<c013bf11>] balance_pgdat+0x1b1/0x200
Jul 27 07:58:58 coyote kernel: [<c013c027>] kswapd+0xc7/0xe0
Jul 27 07:58:58 coyote kernel: [<c01146b0>] autoremove_wake_function+0x0/0x60
Jul 27 07:58:58 coyote kernel: [<c0103fb2>] ret_from_fork+0x6/0x14
Jul 27 07:58:58 coyote kernel: [<c01146b0>] autoremove_wake_function+0x0/0x60
Jul 27 07:58:58 coyote kernel: [<c013bf60>] kswapd+0x0/0xe0
Jul 27 07:58:58 coyote kernel: [<c0102251>] kernel_thread_helper+0x5/0x14
Jul 27 07:58:58 coyote kernel: Code: 89 02 89 49 04 89 09 a1 fc 06 37 c0 0f 18 00 90 ff 0d 04 07
Jul 27 07:58:58 coyote kernel: <6>note: kswapd0[66] exited with preempt_count 1
Jul 27 07:58:58 coyote kernel: c_pid_flush+0x17/0x30
Jul 27 07:58:58 coyote kernel: [<c011779d>] release_task+0x13d/0x1e0
Jul 27 07:58:58 coyote kernel: [<c011923b>] wait_task_zombie+0x15b/0x1c0
Jul 27 07:58:58 coyote kernel: [<c0119653>] sys_wait4+0x213/0x260
Jul 27 07:58:58 coyote kernel: [<c0113420>] default_wake_function+0x0/0x20
Jul 27 07:58:58 coyote kernel: [<c0113420>] default_wake_function+0x0/0x20
Jul 27 07:58:58 coyote kernel: [<c01196c7>] sys_waitpid+0x27/0x2b
Jul 27 07:58:58 coyote kernel: [<c0104089>] sysenter_past_esp+0x52/0x71
With several iterations of this appended next:
Jul 27 07:58:58 coyote kernel: bad: scheduling while atomic!
Jul 27 07:58:58 coyote kernel: [<c030dc3c>] schedule+0x47c/0x490
Jul 27 07:58:58 coyote kernel: [<c01673e4>] __wait_on_inode+0x84/0xa0
Jul 27 07:58:58 coyote kernel: [<c0113420>] default_wake_function+0x0/0x20
Jul 27 07:58:58 coyote kernel: [<c0113420>] default_wake_function+0x0/0x20
Jul 27 07:58:58 coyote kernel: [<c016d7ea>] __writeback_single_inode+0x5a/0xc0
Jul 27 07:58:58 coyote kernel: [<c016d9be>] sync_sb_inodes+0x16e/0x290
Jul 27 07:58:58 coyote kernel: [<c016dc4e>] sync_inodes_sb+0x7e/0xa0
Jul 27 07:58:58 coyote kernel: [<c016ddcb>] sync_inodes+0x7b/0xa0
Jul 27 07:58:58 coyote kernel: [<c014e1f4>] do_sync+0x44/0x80
Jul 27 07:58:58 coyote kernel: [<c014e23f>] sys_sync+0xf/0x20
Jul 27 07:58:58 coyote kernel: [<c011667f>] panic+0xff/0x110
Jul 27 07:58:58 coyote kernel: [<c0118e9f>] do_exit+0x3ff/0x420
Jul 27 07:58:58 coyote kernel: [<c0111640>] do_page_fault+0x0/0x51b
Jul 27 07:58:58 coyote kernel: [<c0104968>] die+0xf8/0x100
Jul 27 07:58:58 coyote kernel: [<c011181b>] do_page_fault+0x1db/0x51b
Jul 27 07:58:58 coyote kernel: [<c0105e12>] do_IRQ+0x102/0x1a0
Jul 27 07:58:58 coyote kernel: [<c030da4e>] schedule+0x28e/0x490
Jul 27 07:58:58 coyote kernel: [<c0111640>] do_page_fault+0x0/0x51b
Jul 27 07:58:58 coyote kernel: [<c0104285>] error_code+0x2d/0x38
Jul 27 07:58:58 coyote kernel: [<c01647d6>] select_parent+0x56/0xb0
Jul 27 07:58:58 coyote kernel: [<c0164840>] shrink_dcache_parent+0x10/0x30
Jul 27 07:58:58 coyote kernel: [<c017b557>] proc_pid_flush+0x17/0x30
Jul 27 07:58:59 coyote kernel: [<c011779d>] release_task+0x13d/0x1e0
Jul 27 07:58:59 coyote kernel: [<c011923b>] wait_task_zombie+0x15b/0x1c0
Jul 27 07:58:59 coyote kernel: [<c0119653>] sys_wait4+0x213/0x260
Jul 27 07:58:59 coyote kernel: [<c0113420>] default_wake_function+0x0/0x20
Jul 27 07:58:59 coyote kernel: [<c0113420>] default_wake_function+0x0/0x20
Jul 27 07:58:59 coyote kernel: [<c01196c7>] sys_waitpid+0x27/0x2b
Jul 27 07:58:59 coyote kernel: [<c0104089>] sysenter_past_esp+0x52/0x71

Now, someone gave me the syntax to do a dis on this, but I'm no intel
assembly guru. If someone could repeat that such that I could apply
it to fs/cache.o, I'd be happy to fwd the results to whomever it might
apply to.

I'd revert to rc1, but I'd have to figure out a way to use this .config
in that tree, I've changed motherboards and this is the only version
I've brought into compliance with this new hardware.

--
Cheers, Gene
There are 4 boxes to be used in defense of liberty.
Soap, ballot, jury, and ammo.
Please use in that order, starting now. -Ed Howdershelt, Author
Additions to this message made by Gene Heskett are Copyright 2004,
Maurice E. Heskett, all rights reserved.
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