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Re: mostly working SMP again



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Hello,

On Jan 5, 2010, at 1:53 PM, Manuel Bouyer wrote:

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 ?

Sounds likely.

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.

I'll try that, thanks!

have fun
Michael

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