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    SubjectRe: hunt for 2.6.37 dm-crypt+ext4 corruption? (was: Re: dm-crypt barrier support is effective)
    On Fri, Dec 10, 2010 at 12:52 AM, Jon Nelson <jnelson@jamponi.net> wrote:
    > On Thu, Dec 9, 2010 at 8:38 PM, Ted Ts'o <tytso@mit.edu> wrote:
    >> On Fri, Dec 10, 2010 at 02:53:30AM +0100, Matt wrote:
    >>>
    >>> Try a kernel before 5a87b7a5da250c9be6d757758425dfeaf8ed3179
    >>>
    >>> from the tests I've done that one showed the least or no corruption if
    >>> you count the empty /etc/env.d/03opengl as an artefact
    >>
    >> Yes, that's a good test.  Also try commit bd2d0210cf.  The patch
    >> series that is most likely to be at fault if there is a regression in
    >> between 5a87b7a5d and bd2d0210cf inclusive.
    >>
    >> I did a lot of testing before submitting it, but that wa a tricky
    >> rewrite.  If you can reproduce the problem reliably, it might be good
    >> to try commit 16828088f9 (the commit before 5a87b7a5d) and commit
    >> bd2d0210cf.  If it reliably reproduces on bd2d0210cf, but is clean on
    >> 16828088f9, then it's my ext4 block i/o submission patches, and we'll
    >> need to either figure out what's going on or back out that set of
    >> changes.
    >>
    >> If that's the case, a bisect of those changes (it's only 6 commits, so
    >> it shouldn't take long) would be most appreciated.
    >
    > I observed the behavior on bd2d0210cf in a qemu-kvm install of
    > openSUSE 11.3 (x86_64) on *totally* different host - an AMD quad-core.
    >
    > I did /not/ observe the behavior on 16828088f9 (yet). I'll run the
    > test a few more times on 1682..
    >
    > Additionally, I am building a bisected kernel now (
    > cb20d5188366f04d96d2e07b1240cc92170ade40 ), but won't be able to get
    > back at it for a while.

    cb20d5188366f04d96d2e07b1240cc92170ade40 seems OK so far. I'm going to
    try 1de3e3df917459422cb2aecac440febc8879d410 soon.


    --
    Jon
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