linux-next: spinlock lockup with next-20081118 on powerpc

[Stephen Rothwell]

Hi Jens,

On Wed, 19 Nov 2008 10:16:28 +0100 Jens Axboe <jens.axboe at oracle.com> wrote:
>
> Strange, so it gets stuck on the timer lock, very weird. You don't
> happen to have output showing that the other CPU is up to at that point?

Unfortunately, no, but I will see what I can find tomorrow.

Today's linux-next still has a problem, but it is slightly different:

Unable to handle kernel paging request for data at address 0x00000000
Faulting instruction address: 0xc000000000503030
cpu 0x0: Vector: 300 (Data Access) at [c00000000ffffa40]
    pc: c000000000503030: ._spin_lock_irqsave+0x40/0x110
    lr: c0000000002571f8: .blk_rq_timed_out_timer+0x48/0x190
    sp: c00000000ffffcc0
   msr: 8000000000009032
   dar: 0
 dsisr: 40000000
  current = 0xc000000022d31040
  paca    = 0xc000000000897300
    pid   = 3399, comm = ckbcomp
enter ? for help
[c00000000ffffd50] c0000000002571f8 .blk_rq_timed_out_timer+0x48/0x190
[c00000000ffffe00] c00000000006c2f4 .run_timer_softirq+0x1c4/0x2a0
[c00000000ffffed0] c000000000065298 .__do_softirq+0xe8/0x1f0
[c00000000fffff90] c000000000029224 .call_do_softirq+0x14/0x24
[c000000022ad3c80] c00000000000d420 .do_softirq+0xf0/0x140
[c000000022ad3d20] c0000000000654a4 .irq_exit+0x74/0x90
[c000000022ad3da0] c000000000025844 .timer_interrupt+0x134/0x150
[c000000022ad3e30] c000000000003700 decrementer_common+0x100/0x180
--- Exception: 901 (Decrementer) at 000000000ff52440

I am currently bisecting yesterday's linux-next.
-- 
Cheers,
Stephen Rothwell                    sfr at canb.auug.org.au
http://www.canb.auug.org.au/~sfr/
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 197 bytes
Desc: not available
URL: <http://lists.ozlabs.org/pipermail/linuxppc-dev/attachments/20081119/fed56b25/attachment.pgp>