Report: ZFS deadlock in 9-STABLE

[Travis Mikalson]

Steven Hartland wrote:
> Any zvols?

No, none.

> ----- Original Message ----- From: "Travis Mikalson" <bofh at terranova.net>
> To: <freebsd-fs at freebsd.org>
> Sent: Wednesday, July 03, 2013 5:40 PM
> Subject: Report: ZFS deadlock in 9-STABLE
> 
> 
>> Hello,
>>
>> To cut to the chase, I have a procstat -kk -a captured during a livelock
>> for you here:
>> http://tog.net/freebsd/zfsdeadlock-storage1-20130703
>>
>> The other relevant configurations I could think of to show you are
>> available within that http://tog.net/freebsd/ directory.
>>
>> If you want any additional information that I haven't given here please
>> let me know!
>>
>> This is a FreeBSD 9-STABLE AMD64 system currently at:
>> r250777: Sat May 18 17:41:39 EDT 2013
>>
>> I didn't see too many relevant ZFS-related fixes after that date so am
>> waiting for another round of interesting commits to update again.
>>
>> Unfortunately, this system has been livelocking on average about once
>> every 7-14 days. Its lot in life is a ZFS storage server serving NFS and
>> istgt traffic.
>>
>> It has 32GB of RAM and is an 8-core 2.6GHz Opteron 6212.
>> The zpool looks like this, it has eight 1TB SAS drives and two SSDs
>> being used for log and cache.
>>
>>  pool: storage1
>> state: ONLINE
>> status: The pool is formatted using a legacy on-disk format.  The pool
>> can
>>        still be used, but some features are unavailable.
>> action: Upgrade the pool using 'zpool upgrade'.  Once this is done, the
>>        pool will no longer be accessible on software that does not
>> support feature
>>        flags.
>>  scan: scrub repaired 0 in 6h4m with 0 errors on Sun Jan  6 06:39:38 2013
>> config:
>>
>>        NAME        STATE     READ WRITE CKSUM
>>        storage1    ONLINE       0     0     0
>>          raidz1-0  ONLINE       0     0     0
>>            da0     ONLINE       0     0     0
>>            da2     ONLINE       0     0     0
>>            da4     ONLINE       0     0     0
>>            da6     ONLINE       0     0     0
>>          raidz1-1  ONLINE       0     0     0
>>            da1     ONLINE       0     0     0
>>            da3     ONLINE       0     0     0
>>            da5     ONLINE       0     0     0
>>            da7     ONLINE       0     0     0
>>        logs
>>          mirror-2  ONLINE       0     0     0
>>            da8p2   ONLINE       0     0     0
>>            da9p2   ONLINE       0     0     0
>>        cache
>>          da8p3     ONLINE       0     0     0
>>          da9p3     ONLINE       0     0     0
>>
>> errors: No known data errors