Date: Thu, 10 Sep 2009 23:52:00 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: "James R. Van Artsdalen" <james-freebsd-fs2@jrv.org> Cc: freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: ZFS hang -CURRENT (9/9/9) Message-ID: <20090910215200.GC2718@garage.freebsd.pl> In-Reply-To: <4AA91F63.1010801@jrv.org> References: <4AA91F63.1010801@jrv.org>
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--Clx92ZfkiYIKRjnr Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Sep 10, 2009 at 10:46:43AM -0500, James R. Van Artsdalen wrote: > FreeBSD pygmy.housenet.jrv 9.0-CURRENT FreeBSD 9.0-CURRENT #4 r197044M: > Wed Sep 9 18:58:08 CDT 2009 =20 > james@pygmy.housenet.jrv:/usr/obj/usr/src/sys/GENERIC amd64 >=20 > ZFS recv hung last night during the daily periodic script. Most of the > pool can be read but if one area is touched the process hangs with ^T > reporting: >=20 > $ find /bigtex > ... > /bigtex/usr/home/james > ^T > load: 0.00 cmd: find 2794 [rrl->rr_cv)] 5861.45r 0.28u 2.02s 0% 1704k >=20 > That's about where the ZFS recv hung: >=20 > receiving incremental stream of > bigtex/usr/home/james/News@syssnap-1246856401 into > bigtex/usr/home/james/News@syssnap-1246856401 > received 15.8MB stream in 59 seconds (275KB/sec) > receiving incremental stream of > bigtex/usr/home/james/News@syssnap-1246942803 into > bigtex/usr/home/james/News@syssnap-1246942803 > received 5.91MB stream in 50 seconds (121KB/sec) > receiving incremental stream of > bigtex/usr/home/james/News@syssnap-1247029203 into > bigtex/usr/home/james/News@syssnap-1247029203 >=20 > There should have 25 or so more snapshots in that filesystem. >=20 > /var/log/messages has no messages. Could you break into DDB debugger and send me output of 'alltrace' command for starters. You can also obtain process backtrace using procstat(1). --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --Clx92ZfkiYIKRjnr Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQFKqXUAForvXbEpPzQRAhYJAJ9M6HabEAUhXvUOxwM7lDEmLjoA2ACcC+fx /Y0fc/gflRU0rwn9pZwVcTo= =St6C -----END PGP SIGNATURE----- --Clx92ZfkiYIKRjnr--
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