kern/151648: [zfs] disk wait bug

[Andriy Gapon]

The following reply was made to PR kern/151648; it has been noted by GNATS.

From: Andriy Gapon <avg at freebsd.org>
To: Bartosz Nowicki <b.nowicki at admin.net.pl>
Cc: bug-followup at freebsd.org
Subject: Re: kern/151648: [zfs] disk wait bug
Date: Sun, 24 Oct 2010 11:12:59 +0300

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 on 23/10/2010 18:43 Bartosz Nowicki said the following:
 > Dnia 23-10-2010 o 10:58:59 Andriy Gapon <avg at icyb.net.ua> napisał(a):
 > 
 >> Please provide procstat -kk -a output.
 > 
 > I would rather not reveal all processes (production OS, many user accounts), but
 > discovered that it's not only when using nginx.
 [snip]
 > If it isn't enough I will send full output.
 
 I believe that the threads you showed so far are "secondary victims".
 I think that there should be a primary victim that got stuck while holding some
 locks and now other threads get stuck on those locks.
 
 Could you please check in procstat -kk -a if there are any threads in zio_wait
 call.  Also, you can send the full output to me privately.
 - -- 
 Andriy Gapon
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