kern/177536: zfs livelock (deadlock) with high write-to-disk load

Martin Birgmeier Martin.Birgmeier at aon.at
Tue Apr 2 18:20:02 UTC 2013


The following reply was made to PR kern/177536; it has been noted by GNATS.

From: Martin Birgmeier <Martin.Birgmeier at aon.at>
To: Andriy Gapon <avg at FreeBSD.org>
Cc: bug-followup at FreeBSD.org
Subject: Re: kern/177536: zfs livelock (deadlock) with high write-to-disk
 load
Date: Tue, 02 Apr 2013 20:07:05 +0200

 Thanks for the pointer - which I knew about, but unfortunately found out
 too late that the kernel needs to be compiled with options STACK and/or
 options DDB/KDB for this to work.
 
 Could this information be added to that page?
 
 I already recompiled the kernel, but are ambivalent about whether I
 should now hope to see the deadlock again... ;-)
 
 One more thing: Could you point me to the SVN revision in head and/or
 stable/9 which presumably contains the (partial) fix?
 
 Regards,
 
 Martin
 
 On 04/01/13 22:51, Andriy Gapon wrote:
 > Two points:
 > - the problem may be (partially) fixed in stable/9
 > - https://wiki.freebsd.org/AvgZfsDeadlockDebug
 >
 


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