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Date:      Fri, 12 Nov 2010 14:13:19 +0200
From:      Andriy Gapon <avg@freebsd.org>
To:        Alexander Zagrebin <alexz@visp.ru>
Cc:        freebsd-fs@freebsd.org, freebsd-stable@freebsd.org
Subject:   Re: 8.1-STABLE: problem with unmounting ZFS snapshots
Message-ID:  <4CDD2F5F.2000902@freebsd.org>
In-Reply-To: <D9ABDE54892A4D9285FE7FFA6E1B1B69@vosz.local>
References:  <D9ABDE54892A4D9285FE7FFA6E1B1B69@vosz.local>

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on 12/11/2010 13:57 Alexander Zagrebin said the following:
> 2. the umount is waiting for disk
> #ps | egrep 'PID|umount'
>   PID  TT  STAT      TIME COMMAND
>   958   0  D+     0:00,04 umount /mnt
> # procstat -t 958
>   PID    TID COMM             TDNAME           CPU  PRI STATE   WCHAN
>   958 100731 umount           -                  3  133 sleep   mntref

procstat -kk <pid>

> Can anybody confirm this issue?
> Any suggestions?
> 

ktrace-ing umount could also be useful.

-- 
Andriy Gapon



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