Date: Thu, 23 Feb 2006 18:50:55 -0500 From: Kris Kennaway <kris@obsecurity.org> To: Greg Rivers <gcr+freebsd-stable@tharned.org> Cc: stable@freebsd.org, "Michael R. Wayne" <freebsd@wayne47.com> Subject: Re: Disk I/O system hang on 5.4-RELEASE-p8 i386 Message-ID: <20060223235055.GA93873@xor.obsecurity.org> In-Reply-To: <20060223163849.I12100@w10.sac.fedex.com> References: <200602231753.k1NHr8c1079056@manor.msen.com> <20060223163849.I12100@w10.sac.fedex.com>
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--lrZ03NoBR/3+SXJZ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Feb 23, 2006 at 04:44:46PM -0600, Greg Rivers wrote: > On Thu, 23 Feb 2006, Michael R. Wayne wrote: >=20 > >Been fighting this for a while. We have an older server, running > >5.4-RELEASE-p8 i386 and used primarily for email, which hangs every > >couple of weeks. The hang seems to be in the disk I/O system; pings > >succeed, and I can continue get a login: prompt on the console until > >I enter a login at which the response stops. > >[snip] >=20 > I think you're seeing the UFS deadlock I reported last November for=20 > RELENG_6. See the thread beginning at=20 > http://lists.freebsd.org/pipermail/freebsd-stable/2005-November/019979.ht= ml >=20 > I believe this issue has made it onto the show-stopper list for=20 > 6.1-RELEASE and is being actively worked on. It's on the todo list, but I don't think it's being worked on yet. The main problem is that we need a way to reproduce it on command. I'd forgotten that snapshots are involved, so maybe it's just a matter of running lots of mksnap_ffs while I/O is in progress. kris --lrZ03NoBR/3+SXJZ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFD/kpfWry0BWjoQKURAqY1AJ9ZyS3eiqNTKXOgNj7ybWhhocpyxwCbBU1Y ve2JXCT7ufFMse1N5x/fRBg= =KmyC -----END PGP SIGNATURE----- --lrZ03NoBR/3+SXJZ--
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