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Date: Mon, 11 Oct 2010 18:45:52 +0300
From: Andriy Gapon <avg@icyb.net.ua>
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To: "Sam Fourman Jr." <sfourman@gmail.com>
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Cc: freebsd-fs@freebsd.org
Subject: Re: Locked up processes after upgrade to ZFS v15
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on 11/10/2010 18:40 Sam Fourman Jr. said the following:
> I am not sure if this is the same issue, but
> I have a similar problem running FreeBSD 9-CURRENT amd64 (sources as
> of 1 hour ago)
> a zfs lockup appears very frequently, it is a NFS server it locks up
> several times per day.
> 
> I have been having these issues since before the ZFSv15 patch was
> committed to HEAD a few months ago.
> let me know if you need details, I have no problems giving you root
> ssh on this machine... but it does  not have a serial port.
> so I am not sure how useful it would be.

Sam,

the problem would be the same if you see processes/threads stuck in zfsmrb wait
state forever.
$ ps axHwwl | fgrep zfsmrb

-- 
Andriy Gapon