Re: kswapd's priority
Raul Miller (rdm@test.legislate.com)
Sun, 28 Jun 1998 13:06:10 -0400
MOLNAR Ingo <mingo@valerie.inf.elte.hu> wrote:
> the problem is, that in the aforementioned case, there is no
> connection leading to raid5d (i dont know the NFS code that well, do
> we still have biod's that act as IO agents?). raid5d has an anonymous
> bh, which will lead the the page's waitqueue when the IO finishes,
> but there is no way we can get to raid5d from the page waitqueue.
> (it's not even repeatable, eg. raid1d does read balancing, so a given
> request can end up anywhere).
And combining priorities with read balancing would require completely
re-doing the balancing. Otherwise you promote the priority of all reads,
which seems like a lot of work to accomplish nothing.
--
Raul
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