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    SubjectRe: frequent softlockups with 3.10rc6.
    On Wed, Jun 26, 2013 at 09:18:53PM +0200, Oleg Nesterov wrote:
    > On 06/25, Dave Jones wrote:
    > >
    > > Took a lot longer to trigger this time. (13 hours of runtime).
    >
    > And _perhaps_ this means that 3.10-rc7 without 8aac6270 needs more
    > time to hit the same bug ;)
    >
    > Dave, I am not going to "deny the problem". We should investigate it
    > anyway. And yes, 8aac6270 is not as trivial as it looks.
    >
    > But so far it is absolutely unclear how it can trigger such a problem,
    > and none of the traces _look_ as if it should be blamed.
    >
    > Probably I should try to reproduce too...

    I've tried so many different kernels this last week that I've forgotten
    just how long I left the build without 8aac6270 running, but I'm pretty
    sure it included an overnight run last weekend. Given I have two identical
    machines that can reproduce it, I'll leave one running for a few days
    with that reverted just to see if it turns up.

    (Though, I seem to be walking into other issues [like the perf overflow bug
    I reported last night] before seeing the lockups reproduce, so I'll keep an eye on it).

    Dave



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