Date: Mon, 29 Jun 2009 15:11:08 +0200 From: Attilio Rao <attilio@freebsd.org> To: pluknet <pluknet@gmail.com> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: [nfs] process locks in "bo_wwait" on 6.4 Message-ID: <3bbf2fe10906290611j683a0ddawbd524e406e832d54@mail.gmail.com> In-Reply-To: <a31046fc0906290555ib9abf4fy90502eb01e2ef8d3@mail.gmail.com> References: <a31046fc0906260944h68eed26bs256dcad1f29871ff@mail.gmail.com> <a31046fc0906260951i66c239e1yfac9048d69784209@mail.gmail.com> <a31046fc0906290329p3e9cff1dwa89c8bb88736fed7@mail.gmail.com> <3bbf2fe10906290458v3d57441ar44c4ed8f36c957f@mail.gmail.com> <a31046fc0906290555ib9abf4fy90502eb01e2ef8d3@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
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? What revision of /usr/src/sys/kern/vfs_bio.c are you running with? Thanks, Attilio -- Peace can only be achieved by understanding - A. Einstein
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3bbf2fe10906290611j683a0ddawbd524e406e832d54>