Date: Fri, 13 Jul 2012 17:06:32 +0200 From: Fabian Keil <freebsd-listen@fabiankeil.de> To: Lytochkin Boris <lytboris@gmail.com> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS hanging Message-ID: <20120713170632.065e650e@fabiankeil.de> In-Reply-To: <CAEJYa-RFuJKTOd3_Ykj3Z8KYPuYoQUwiwOr5i37C0FeZ2MUsvw@mail.gmail.com> References: <1341864787.32803.43.camel@btw.pki2.com> <20120712151541.7f3a6886@fabiankeil.de> <CAEJYa-RFuJKTOd3_Ykj3Z8KYPuYoQUwiwOr5i37C0FeZ2MUsvw@mail.gmail.com>
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--Sig_/nBRIgBzrnRkWba/7Gs/6f6v Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Lytochkin Boris <lytboris@gmail.com> wrote: > On Thu, Jul 12, 2012 at 5:15 PM, Fabian Keil > <freebsd-listen@fabiankeil.de> wrote: > > fk@r500 ~ $zpool status > > load: 0.15 cmd: zpool 2698 [spa_namespace_lock] 543.23r 0.00u 0.12s 0%= 2908k >=20 > This sounds familiar with http://www.freebsd.org/cgi/query-pr.cgi?pr=3D16= 3770 > Try playing with kern.maxvnodes. Thanks for the suggestion, but the system is my laptop and I already set kern.maxvnodes=3D400000 which I suspect is more than I'll ever need. Currently I uses less than a tenth of this, but I'll keep an eye on it the next time the issue occurs. I usually reach this deadlock after losing the vdev in a single-vdev pool. My suspicion is that the deadlock is caused by some kind of "failure to communicate" between ZFS and the various geom layers involved. I already know that losing vdevs with the pool configuration I use can cause http://www.freebsd.org/cgi/query-pr.cgi?pr=3Dkern/162010 and http://www.freebsd.org/cgi/query-pr.cgi?pr=3Dkern/162036 and I suspect that the deadlock is just another symptom of the same issue. Fabian --Sig_/nBRIgBzrnRkWba/7Gs/6f6v Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (FreeBSD) iEYEARECAAYFAlAAOXsACgkQBYqIVf93VJ0LYgCeNmcExneJ+80TvbWRkT4lJCj2 VfkAnjTZ4cFWW9rBh12reXjgvBLu+jzU =b0B3 -----END PGP SIGNATURE----- --Sig_/nBRIgBzrnRkWba/7Gs/6f6v--
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