Re: 2.5.34 BUG at kernel/sched.c:944 (partitions code related?)

From: Jens Axboe (axboe@suse.de)
Date: Tue Sep 10 2002 - 09:06:22 EST

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On Tue, Sep 10 2002, Oleg Drokin wrote:
> Hello!
>
> Starting with yesterday I am seeing kernel BUG at sched.c:944
> on 2.5.3[34], I've seen similar report for 2.5.31 in the list with no
> responces, however 2.5.31 was working fine for me.
>
> Stack trace for the BUG was entirely within idle task (default_idle,
> rest_init, cpu_idle, ...)
>
> It explodes immediatelly after printing:
> hda: hda1 hda2 hda3 hda4 < hda5
>
> Then panics trying to kill interrupt handler.
>
> On 2.4 this partition layout looks like this:
> hda: [PTBL] [7476/255/63] hda1 hda2 hda3 hda4 < hda5 hda6 >
>
> Box itself is Dual Athlon MP 1700+. IDE only, 1G RAM, highmem enabled.
>
> Other strange thing that caught my attention is this, if in 2.5.31 I had
> this order or disk detection:
> <4>hda: IC35L060AVER07-0, ATA DISK drive
> <4>hdb: IC35L060AVER07-0, ATA DISK drive
> <4>ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> <4>hda: host protected area => 1
> <6>hda: 120103200 sectors (61493 MB) w/1916KiB Cache, CHS=119150/16/63
> <4>hdb: host protected area => 1
> <6>hdb: 120103200 sectors (61493 MB) w/1916KiB Cache, CHS=119150/16/63
> <6> hda: hda1 hda2 hda3 hda4 < hda5 hda6 >
> <6> hdb: hdb1
>
> Now it does it in reverse like this:
> hdb: host protected area => 1
> hdb: 120103200 sectors (61493 MB) w/1916KiB Cache, CHS=119150/16/63
> hdb: hdb1
> hda: host protected area => 1
> hda: 120103200 sectors (61493 MB) w/1916KiB Cache, CHS=119150/16/63
> hda: hda1 hda2 hda3 hda4 < hda5PANIC

Kernel compiled with preempt support or not?

-- Jens Axboe

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