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Message-ID: <AANLkTi=PTp7YW_eYxtF-H2QSxgei3whWH59wU0C9oCkz@mail.gmail.com> Date: Tue, 28 Sep 2010 18:16:19 +0200 From: richard -rw- weinberger <richard.weinberger@...il.com> To: tj@...nel.org Cc: LKML <linux-kernel@...r.kernel.org>, user-mode-linux-devel@...ts.sourceforge.net, axboe@...nel.dk, jdike@...toit.com, Geert.Uytterhoeven@...ycom.com, grant.likely@...retlab.ca, adrian@...en.demon.co.uk, mike.miller@...com, Chris Frey <cdfrey@...rsquare.net> Subject: [REGRESSION] um: ubd: block layer issue (Was: ext3 filesystem corruption in user mode linux) Hi Tejun! Chris Frey ran into some problems with ext3 on UML. See: http://marc.info/?i=20100924041410.GA18040%20()%20foursquare%20!%20net I can reproduce this issue with any file system on Linux >= 2.6.31. There seems to be a serious problem with the block layer on UML. Under high load any file system gets corrupted. The regression was most likely introduced with this three changes: 83096ebf1263b2c1ee5e653ba37d993d02e3eb7b (block: convert to pos and nr_sectors accessors) f81f2f7c9fee307e371f37424577d46f9eaf8692 (ubd: drop unnecessary rq->sector manipulation) 4d6c84d91d1a539ebc47d1a36a35e9390ba11fdc (ubd: cleanup completion path) Maybe only f81f2f7 is the bad one. They depend on each and I don't know all the internals... -- Cheers, //richard -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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