Re: mostly working SMP again

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Mon, Jan 04, 2010 at 10:28:19PM -0500, Michael wrote:
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> Hello,
> 
> On Jan 4, 2010, at 10:04 PM, matthew green wrote:
> 
> >  hmm, maybe that panic from scsipi wasn't all that unrelated after  
> >all
> >  - - I got another one:
> >  sdstart(): dequeued wrong buf
> >  scsipi_put_xs()
> >  scsipi_complete()
> >  scsipi_done()
> >  ncr53c9x_done()
> >  ncr53c9x_intr()
> >
> >
> >hmmm..i don't have any disks or cdrom in my sparc box..
> 
> hmm, it took an interrupt in uvm_fault_internal() - is that supposed  
> to happen?
> Also, the MP kernel made it all the way through filesystem checks /  
> log replays and only crapped out when sshd started.
> 
> Any idea what's happening here?

Maybe something fails to grab the kernel_lock ?
Can you add a check (KASSERT or something) that the kernel_lock is
held in ncr53c9x_intr() and ncr53c9x_scsipi_request() ?

Maybe something like
KASSERT(__SIMPLELOCK_LOCKED_P(kernel_lock)
or
KASSERT(ci->ci_biglock_count > 0)
will work to check this.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
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