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    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.

    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...


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