Date: Mon, 29 Jun 2009 17:18:03 +0400 From: pluknet <pluknet@gmail.com> To: Attilio Rao <attilio@freebsd.org> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: [nfs] process locks in "bo_wwait" on 6.4 Message-ID: <a31046fc0906290618r31e5bfb0h9e267fadef53408a@mail.gmail.com> In-Reply-To: <3bbf2fe10906290611j683a0ddawbd524e406e832d54@mail.gmail.com> References: <a31046fc0906260944h68eed26bs256dcad1f29871ff@mail.gmail.com> <a31046fc0906260951i66c239e1yfac9048d69784209@mail.gmail.com> <a31046fc0906290329p3e9cff1dwa89c8bb88736fed7@mail.gmail.com> <3bbf2fe10906290458v3d57441ar44c4ed8f36c957f@mail.gmail.com> <a31046fc0906290555ib9abf4fy90502eb01e2ef8d3@mail.gmail.com> <3bbf2fe10906290611j683a0ddawbd524e406e832d54@mail.gmail.com>
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2009/6/29 Attilio Rao <attilio@freebsd.org>: > 2009/6/29 pluknet <pluknet@gmail.com>: >> 2009/6/29 Attilio Rao <attilio@freebsd.org>: >>> 2009/6/29 pluknet <pluknet@gmail.com>: >>>> 2009/6/26 pluknet <pluknet@gmail.com>: >>>>> 2009/6/26 pluknet <pluknet@gmail.com>: >>>>>> Hello. >>>>>> >>>>>> While building a module on nfs mounted /usr/src >>>>>> I got an unkillable process waiting forever in bo_wwait. >>>>> >>>>> Small note: iface on NFS server has mtu changed from 1500 to 1450. >>>>> Can this be a source of the problem? >>>> >>>> This is 100% reproducible. Lock in the same place. Any hints? >>> >>> Can you also show the value of ps? >>> A precise map of what processes are doing would give an help. >>> Also would be useful to printout traces for other threads and not only >>> the stucked one. >>> >> >> >From another run: > > I'm unable to see who would be locking the buffer object in question. > Do you have INVARIANT_SUPPORT/INVARIANTS on? Yes, I do both. > What revision of /usr/src/sys/kern/vfs_bio.c are you running with? > As of 6.4-R: CVS rev 1.491.2.12.4.1 / SVN rev 183531. -- wbr, pluknet
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