Re: .17rc5 cfq slab corruption.

[Jens Axboe]

On Tue, May 30 2006, Dave Jones wrote:
> On Tue, May 30, 2006 at 06:49:18PM +0200, Jens Axboe wrote:
> 
>  > > List corruption. next->prev should be f74a5e2c, but was ea7ed31c
>  > > Pointing at cfq_set_request.
>  > 
>  > I think I'm missing a piece of this - what list was corrupted, in what
>  > function did it trigger?
> 
> If you look at the attachment in the bugzilla url in my previous msg,
> you'll see this:
> 
> ay 30 05:31:33 mandril kernel: List corruption. next->prev should be f74a5e2c, but was ea7ed31c
> May 30 05:31:33 mandril kernel: ------------[ cut here ]------------
> May 30 05:31:33 mandril kernel: kernel BUG at include/linux/list.h:58!
> May 30 05:31:33 mandril kernel: invalid opcode: 0000 [#1]
> May 30 05:31:33 mandril kernel: SMP
> May 30 05:31:33 mandril kernel: last sysfs file: /devices/pci0000:00/0000:00:1f.3/i2c-0/0-002e/pwm3
> May 30 05:31:33 mandril kernel: Modules linked in: iptable_filter ipt_DSCP iptable_mangle ip_tables x_tables eeprom lm85 hwmon_vid hwmon i2c_isa ipv6 nls_utf8 loop dm_mirror dm_mod video button battery ac lp parport_pc parport ehci_hcd uhci_hcd floppy snd_intel8x0 snd_ac97_codec snd_ac97_bus sg snd_seq_dummy matroxfb_base snd_seq_oss snd_seq_midi_event matroxfb_DAC1064 snd_seq matroxfb_accel matroxfb_Ti3026 3w_9xxx matroxfb_g450 snd_seq_device g450_pll matroxfb_misc snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd e1000 soundcore snd_page_alloc i2c_i801 i2c_core ext3 jbd 3w_xxxx ata_piix libata sd_mod scsi_mod
> May 30 05:31:33 mandril kernel: CPU:    0
> May 30 05:31:33 mandril kernel: EIP:    0060:[<c04e3310>]    Not tainted VLI
> May 30 05:31:33 mandril kernel: EFLAGS: 00210292   (2.6.16-1.2227_FC6 #1)
> May 30 05:31:33 mandril kernel: EIP is at cfq_set_request+0x202/0x3ff

Just do a l *cfq_set_request+0x202 from gdb if you have
CONFIG_DEBUG_INFO enabled in your vmlinux.

-- 
Jens Axboe

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