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    SubjectRe: swapoff() runs forever
    Am 09.04.2012 20:40, schrieb Hugh Dickins:
    > I've not seen any such issue in recent months (or years), but
    > I've not been using UML either. The most likely cause that springs
    > to mind would be corruption of the vmalloc'ed swap map: that would
    > be very likely to cause such a hang.

    It does not look like a swap map corruption.
    If I restart most user space processes swapoff() terminates fine.
    Maybe it is a refcounting problem?

    > You say "recent Linux kernels": I wonder what "recent" means.
    > Is this something you can reproduce quickly and reliably enough
    > to do a bisection upon?
    >

    I can reproduce the issue on any UML kernel.
    The oldest I've tested was 2.6.20.
    Therefore, bug was not introduced by me. B-)

    Thanks,
    //richard


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