Date: Thu, 8 Apr 2010 17:05:39 +0200 From: Attilio Rao <attilio@freebsd.org> To: Marcin Cieslak <saper@saper.info> Cc: freebsd-current@freebsd.org Subject: Re: ZFS DEADLKRES Message-ID: <h2t3bbf2fe11004080805t9eb4f591h289b5b0eca1c1706@mail.gmail.com> In-Reply-To: <alpine.BSF.2.00.1002220007460.36922@x.fncre.vasb> References: <slrnhnoupe.24kp.saper@saper.info> <3bbf2fe11002200946h7480d203naabd7a49fd851f5a@mail.gmail.com> <alpine.BSF.2.00.1002220007460.36922@x.fncre.vasb>
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2010/2/22 Marcin Cieslak <saper@saper.info>: > > > > On Sat, 20 Feb 2010, Attilio Rao wrote: > >> 2010/2/18 Marcin Cieslak <saper@saper.info>: >>> >>> My r203753 amd64 laptop falls into the deadlock situation >>> every night while running periodic daily script. I am pretty >>> certain this is related to ZFS. >>> >>> I have enabled DEADLKRES in the kernel. I even have >>> a separate dump partition (not used for swap). >> >> May you reproduce the bug with WITNESS? >> If you can, you should enable DEADLKRES too and once it panics let >> extract a textdump(4) with the following commands: >> bt, ps, show alllocks, show pcpu, allthreads > > Unfortunately, there is no way to write anything to disk. > All attempts to talk to the ata subsystem from ddb(4) > fail with EIO (probably timeout). This may be a false positive. May you please try the following patch and report if you can fix it does fix it or not?: http://www.freebsd.org/~attilio/Sandvine/deadlkres/deadlkres-blessed.diff Thanks, Attilio -- Peace can only be achieved by understanding - A. Einstein
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