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Date: Tue, 29 Jan 2013 10:20:48 +0200
From: Andriy Gapon <avg@FreeBSD.org>
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To: Garrett Wollman <wollman@FreeBSD.org>
Subject: Re: ZFS deadlock on rrl->rr_ -- look familiar to anyone?
References: <20743.16429.97668.569869@hergotha.csail.mit.edu>
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on 29/01/2013 05:21 Garrett Wollman said the following:
> When
> I restarted mountd, it hung waiting on rrl->rr_, but the system may
> already have been deadlocked at that point.  procstat reported:
> 
> 87678 104365 mountd           -                mi_switch sleepq_wait _cv_wait rrw_enter zfs_root lookup namei vfs_donmount sys_nmount amd64_syscall Xfast_syscall 
...
> If it happens again

procstat -kk -a

-- 
Andriy Gapon