Re: TSTILE, pmap, and bad analog numbers

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

On Tue, Jul 09, 2013 at 05:45:31PM -0500, Donald Lee wrote:
> I can get there, and do the ps.  There are dozens (hundreds?) of processes
> hung on tstile.  The vast majority are httpd.
> 
> I'll do some stack traces next time it fails.  I can get a failure reliably
> with a GENERIC kernel (whether I build it or use the release) in a few hours.
> I'm working on a better test case that might fail with a debug kernel.
> 
> Comparing the stack traces might reveal some clues.  I presume that most
> of them will be identical, so I can focus on the ones that are "different".

Yes, that's one thing to look at. But it's likely that the process
holding the lock all other processes are waiting for is not waiting
on tstile. So with the stack trace you can locate which lock is held, and
from here try to find which process is holding it and get a stack trace
for this process. 

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