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    SubjectRe: 2.4.2-ac3: loop threads in D state


    On Mon, 26 Feb 2001, Jens Axboe wrote:

    > On Sun, Feb 25 2001, Alexander Viro wrote:
    > > Let me elaborate: the race is very narrow and takes deliberate efforts to
    > > hit. It _can_ be triggered, unfortunately. This extra up() will mess your
    > > life later on.
    >
    > What's the worst that can happen? We do an extra up, but loop_thread
    > will still quit once we hit zero lo_pending. And loop_clr_fd
    > is still protected by lo_ctl_mutex.

    Well, for one thing you'll get some surprises next time you losetup
    the same device ;-) There are more subtle scenarios, but that one
    is pretty unpleasant in itself.
    Cheers,
    Al

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