sleeping thread panic?

[Konstantin Belousov]

On Sun, Jul 08, 2012 at 12:57:39PM -0400, Michael Butler wrote:
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> On 07/08/12 11:18, Michael Butler wrote:
> > On 07/08/12 10:31, Konstantin Belousov wrote:
> >> Catch it next time ? This should be quite reproducable, if real.
> > 
> >> Actually, try this.
> > 
> >> diff --git a/sys/vm/vm_pageout.c b/sys/vm/vm_pageout.c
> >> index 9485fdd..de33afc 100644
> >> --- a/sys/vm/vm_pageout.c
> >> +++ b/sys/vm/vm_pageout.c
> >> @@ -1030,7 +1030,6 @@ rescan0:
> >>  					++pageout_lock_miss;
> >>  					if (object->flags & OBJ_MIGHTBEDIRTY)
> >>  						vnodes_skipped++;
> >> -					vm_page_lock_queues();
> >>  					goto unlock_and_continue;
> 
>  [ .. snip .. ]
> 
> > Just waiting for the second of two attached RAID arrays to finish
> > rebuilding and I'll give this a shot - thanks!
> 
> I repeated the dumps from last night over NFS with this patch installed
> and no more panics :-)

But, are panics reproducable without the patch ?
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