kern/161968: [zfs] [hang] renaming snapshot with -r including a zvol snapshot causes total ZFS freeze/lockup

Mon Jun 11 08:30:11 UTC 2012

The following reply was made to PR kern/161968; it has been noted by GNATS.

From: Peter Maloney <peter.maloney at brockmann-consult.de>
To: bug-followup at FreeBSD.org, peter.maloney at brockmann-consult.de
Cc:  
Subject: Re: kern/161968: [zfs] [hang] renaming snapshot with -r including
 a zvol snapshot causes total ZFS freeze/lockup
Date: Mon, 11 Jun 2012 10:23:58 +0200

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 I've tested this in 8.3-RELEASE, and 8.3-STABLE pulled last week. *Both
 hang*, even though 8.2-STABLE in Feb 2012 did not hang.

 First terminal:

 Snapshot
 Renaming from to 1
 load: 0.00  cmd: zfs 57149 [tx->tx_sync_done_cv)] 104.03r 0.00u 0.00s 0%
 1920k

 Second:
 # zfs list
 load: 0.00  cmd: zfs 58403 [spa_namespace_lock] 119.06r 0.00u 0.00s 0% 1796k

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     I've tested this in 8.3-RELEASE, and 8.3-STABLE pulled last week. <b>Both
       hang</b>, even though 8.2-STABLE in Feb 2012 did not hang.<br>
     <br>
     First terminal:<br>
     <br>
     Snapshot<br>
     Renaming from to 1<br>
     load: 0.00&nbsp; cmd: zfs 57149 [tx-&gt;tx_sync_done_cv)] 104.03r 0.00u
     0.00s 0% 1920k<br>
     <br>
     <br>
     Second:<br>
     # zfs list<br>
     load: 0.00&nbsp; cmd: zfs 58403 [spa_namespace_lock] 119.06r 0.00u 0.00s
     0% 1796k<br>
     <br>
   </body>
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