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    SubjectRe: [patch] vmfixes-2.4.0-test9-B2

    On Mon, 25 Sep 2000, Andrea Arcangeli wrote:

    > - sync_page(page);
    > set_task_state(tsk, TASK_UNINTERRUPTIBLE);
    > + sync_page(page);

    > - run_task_queue(&tq_disk);
    > set_task_state(tsk, TASK_UNINTERRUPTIBLE);
    > + run_task_queue(&tq_disk);

    these look like genuine fixes, but i dont think they can explain the hangs
    i had yesterday - those were simple VM deadlocks. I dont see any deadlocks
    today - but i'm running the unsafe B2 variant of the vmfixes patch. (and i
    have no swapping enabled which simplifies my VM setup.)

    but one of these two fixes could explain the slowdown i saw on and off for
    quite some time, seeing very bad read performance occasionally. (do you
    remember my sched.c tq_disc hack?)


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