Date: Mon, 30 Nov 2009 19:13:30 +1100 From: Peter Jeremy <peterjeremy@acm.org> To: Thomas Backman <serenity@exscape.org> Cc: freebsd-current@freebsd.org Subject: Re: Non-responsive 8.0-RC1 Message-ID: <20091130081330.GA2202@server.vk2pj.dyndns.org> In-Reply-To: <3ABF47F1-86EC-4CF2-9D42-86344D0F455B@exscape.org> References: <20091128212226.GA9841@server.vk2pj.dyndns.org> <3ABF47F1-86EC-4CF2-9D42-86344D0F455B@exscape.org>
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--T4sUOijqQbZv57TR Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2009-Nov-29 08:56:55 +0100, Thomas Backman <serenity@exscape.org> wrote: > >On Nov 28, 2009, at 10:22 PM, Peter Jeremy wrote: > >> My main server is running 8.0/amd64 from between RC1 and RC2 and I've >> recently had a couple of long-duration hangs on it during which time >> processes doing I/O will stop responding. I forgot to mention that I checked SMART state on the disks and also did a 'zpool scrub' after the first occurrence - no problems showed up. It actually "hung" again just after I sent the original mail. This time I managed to get console access and could check the kernel state. This showed that a number of processes were blocked on ZFS locks. The most commonly reported state was 'tx->tx_quiesce_done_cv)'. It had been up for about 30 days before I noticed any problems and seems to have been getting more obvious so it is also possible that it's related to uptime - either a resource leak somewhere (though there was nothing obvious) or memory fragmentation. >Hmm, I know there was some fix to the scheduler re: thread priority, >and it wouldn't surprise me if it was after your revision. After looking around in the kernel, I'm now confident that it's not a priority-inversion issue as the BOINC processes all appeared to be running normally and not holding locks. >My advice would be to upgrade to -RELEASE if possible. If not, at >least check whether your build should be affected. I have updated to a recent 8-stable and will see what happens. --=20 Peter Jeremy --T4sUOijqQbZv57TR Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.13 (FreeBSD) iEYEARECAAYFAksTfqoACgkQ/opHv/APuIdDiQCeMYxNFM0rgtiJUjt9hKnsC9U/ khMAn3omYgPFukvzSo4XEWISEinxBAAL =R42y -----END PGP SIGNATURE----- --T4sUOijqQbZv57TR--
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