NeilBrown <neilb@cse.unsw.edu.au> wrote:
>
> + if (sh == NULL) {
> + sh = get_active_stripe(conf, sector_nr, pd_idx, 0);
> + /* make sure we don't swamp the stripe cache if someone else
> + * is trying to get access
> + */
> + yield();
> + }
In 2.6, yield() has utterly awful behaviour when there are a lot of other
runnable tasks.
Have you tested this when the kernel is busy doing other stuff, like a
`make -j2' or a few busywait loops? You might find that rebuild simply
stops.
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