Date: Fri, 21 May 2010 02:34:05 +0200 From: Erik Cederstrand <erik@cederstrand.dk> To: Jeff Roberson <jroberson@jroberson.net> Cc: Attilio Rao <attilio@freebsd.org>, current@freebsd.org, Peter Jeremy <peterjeremy@acm.org> Subject: Re: LOR: ufs vs bufwait Message-ID: <ECB15F9F-F5FC-41FF-8A80-ED299AFE432F@cederstrand.dk> In-Reply-To: <alpine.BSF.2.00.1005121040390.1398@desktop> References: <20100508102005.GB1867@elmar.spoerlein.net> <20100510061057.GA93038@server.vk2pj.dyndns.org> <u2h3bbf2fe11005101353k493f3ca3v7c1216e840820c67@mail.gmail.com> <20100512141154.GF88504@acme.spoerlein.net> <alpine.BSF.2.00.1005121040390.1398@desktop>
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--Apple-Mail-377--257897853 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Den 12/05/2010 kl. 22.44 skrev Jeff Roberson: >=20 > I think Peter Holm also saw this once while we were testing SUJ and = reproduced ~30 second hangs with stock sources. At this point we need = to brainstorm ideas for adding debugging instrumentation and come up = with the quickest possible repro. FWIW, I get this LOR on a ClangBSD virtual machine running the stess2 = test suite. I can reproduce the LOR reliably like this: # cd stress2 #./run.sh lockf.cfg - press ctrl-C - another LOR is triggered by the ctrl-C (a dirhash/bufwait LOR = described in kern/137852) # ./run.sh mkdir.cfg - LOR is triggered immediately Erik= --Apple-Mail-377--257897853--
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