Messages in this thread | | | Date | Sun, 28 Jun 1998 13:06:10 -0400 | From | Raul Miller <> | Subject | Re: kswapd's priority |
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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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