Re: [PATCH -mm] throttle direct reclaim when too many pages are isolated already (v3)

Pavel Machek
2009-07-29T15:04:53Z

On Wed 2009-07-15 23:53:18, Rik van Riel wrote:
> When way too many processes go into direct reclaim, it is possible
> for all of the pages to be taken off the LRU. One result of this
> is that the next process in the page reclaim code thinks there are
> no reclaimable pages left and triggers an out of memory kill.
>
> One solution to this problem is to never let so many processes into
> the page reclaim path that the entire LRU is emptied. Limiting the
> system to only having half of each inactive list isolated for
> reclaim should be safe.

Is this still racy? Like on 100cpu machine, with LRU size of 50...?
--
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