Date: Fri, 14 Dec 2012 11:19:40 -0800 From: olivier <olivier777a7@gmail.com> To: "Kenneth D. Merry" <ken@freebsd.org> Cc: freebsd-fs@freebsd.org, freebsd-stable@freebsd.org, Kashyap.Desai@lsi.com, Andriy Gapon <avg@freebsd.org> Subject: Re: NFS/ZFS hangs after upgrading from 9.0-RELEASE to -STABLE Message-ID: <CALC5%2B1PvHL-nfdf9dJFj2MKZHabqNqAKdsuhNHMP30SGLaerpA@mail.gmail.com> In-Reply-To: <20121214182147.GA66456@nargothrond.kdm.org> References: <CALC5%2B1Ptc=c_hxfc_On9iDN4AC_Xmrfdbc1NgyJH2ZxP6fE0Aw@mail.gmail.com> <50C9AFC6.6080902@FreeBSD.org> <CALC5%2B1MRurpbznOYrnE%2BK%2B=BEuj80iqJUbYkLN7SKFwtKqbE1Q@mail.gmail.com> <50CA1639.1010409@FreeBSD.org> <CALC5%2B1MpTUxtfJFN2Zu8%2BOSQ81ioEOTWApEY7zLB1tUkdsUj%2BQ@mail.gmail.com> <CALC5%2B1PdPnnx4ARGDOZeHKYuUVknQFGSKOZR1tz-mDDwCR%2B-8Q@mail.gmail.com> <20121214182147.GA66456@nargothrond.kdm.org>
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Sorry about the confusion. I'd forgotten to mention that a few of the disks in the pool in which that ZFS filesystem resides are actually provided through the mps driver. In other words, my pool has a couple disks it sees through the mps driver, and other disks it sees through the mpt driver. (For the sake of completeness, the same machine also has ZFS on root, with a pool formed from a single mps disk; I haven't formally excluded that the hangs are due to my root pool but that probably doesn't change the problem). Reed: I'm happy to provide my compiled kernel for you to try out (if you're using generic). To compile yourself, checkout 9-STABLE, replace /usr/src/sys/dev/mps by the version from 9.0, and edit sys/conf/files and sys/modules/mps/Makefile to revert the diffs shown in http://svnweb.freebsd.org/base?view=revision&revision=230592 I'm sure there's a more elegant way of doing this (would it be safe to just copy over mps.ko from 9.0?). Olivier On Fri, Dec 14, 2012 at 10:21 AM, Kenneth D. Merry <ken@freebsd.org> wrote: > > This doesn't quite make sense. In your original email, you said that > you're using a mpt-based Fibre Channel card and have a ZFS filesystem on > top of that. > > If that's the case, why would going back to an older version of the mps(4) > driver change things at all? It has no support for that hardware. > > Ken > > On Thu, Dec 13, 2012 at 22:14:15 -0800, olivier wrote: > > For what it's worth, I think I might have solved my problem by reverting > to > > an older version of the mps driver. I checked out a recent version of > > 9-STABLE and reversed the changes in > > http://svnweb.freebsd.org/base?view=revision&revision=230592 (perhaps > there > > was a simpler way of reverting to the older mps driver). So far so good, > no > > hang even when hammering the file system. > > > > This does not conclusively prove that the new LSI mps driver is at fault, > > but that seems to be a likely explanation. > > > > Thanks to everybody who pointed me in the right direction. Hope this > helps > > others who run into similar problems with 9.1 > > Olivier > > > > On Thu, Dec 13, 2012 at 10:14 AM, olivier <olivier777a7@gmail.com> > wrote: > > > > > > > > > > > On Thu, Dec 13, 2012 at 9:54 AM, Andriy Gapon <avg@freebsd.org> wrote: > > > > > >> Google for "zfs deadman". This is already committed upstream and I > think > > >> that it > > >> is imported into FreeBSD, but I am not sure... Maybe it's imported > just > > >> into the > > >> vendor area and is not merged yet. > > >> > > > > > > Yes, that's exactly what I had in mind. The logic for panicking makes > > > sense. > > > As far as I can tell you're correct that deadman is in the vendor area > but > > > not merged. Any idea when it might make it into 9-STABLE? > > > Thanks > > > Olivier > > > > > > > > > > > > > > >> So, when enabled this logic would panic a system as a way of letting > know > > >> that > > >> something is wrong. You can read in the links why panic was selected > for > > >> this job. > > >> > > >> And speaking FreeBSD-centric - I think that our CAM layer would be a > > >> perfect place > > >> to detect such issues in non-ZFS-specific way. > > >> > > >> -- > > >> Andriy Gapon > > >> > > > > > > > > -- > Kenneth Merry > ken@FreeBSD.ORG >
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