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    SubjectRe: [Regression] 3.15 mmc related ext4 corruption with qemu-system-arm
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    On Fri, Aug 8, 2014 at 5:32 PM, Theodore Ts'o <tytso@mit.edu> wrote:
    > On Fri, Aug 08, 2014 at 05:17:54PM -0700, John Stultz wrote:
    >> On 08/08/2014 05:15 PM, Kees Cook wrote:
    >> > On Fri, Aug 8, 2014 at 2:14 PM, John Stultz <john.stultz@linaro.org> wrote:
    >> >> I sunk a couple of weeks bisecting to try to narrow down the more
    >> >> sporadic issue, but was unsuccessful past the initial commit above.
    >> >> Since then I've been far too swamped to spend any more time on it. Even
    >> >> so, its a *major* pain for testing but it seems like no one else really
    >> >> cares?
    >> > I'm in the same boat as far as poor bisection results. :(
    >> >
    >> > However, I keep using the 3-patch mmci fix series from Ulf, and
    >> > haven't hit any trouble with them. Though perhaps I'm just getting
    >> > lucky?
    >> >
    >> > http://git.kernel.org/cgit/linux/kernel/git/kees/linux.git/log/?h=arm/fix-mmci
    >>
    >> I guess I'll give that another shot
    >
    > There was an ext4 bug that might have caused this problem. It was
    > fixed in v3.15.6 and v3.16-rc5.

    Sweet! Many thanks to Eric for chasing that down (I spent a ton of
    time with no results, so I can't imagine how much effort it took him)
    and you for pointing it out.

    So yes, so far I'm not seeing any filesystem panics w/ Linus' head +
    with Ulf's patches in Kees tree above. That makes me *very* happy.

    Ulf: Are you planning to push those upstream (and to -stable) soon?

    thanks
    -john


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