Messages in this thread | | | Date | Thu, 06 Sep 2007 12:38:13 -0400 | From | Rik van Riel <> | Subject | Re: [PATCH] prevent kswapd from freeing excessive amounts of lowmem |
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Andrew Morton wrote:
> I guess for a very small upper zone and a very large lower zone this could > still put the scan balancing out of whack, fixable by a smarter version of > "8*zone->pages_high" but it doesn't seem very likely that this will affect > things much. > > Why doesn't direct reclaim need similar treatment?
Because we only go into the direct reclaim path once every zone is at or below zone->pages_low, and the direct reclaim path will exit once we have freed more than swap_cluster_max pages.
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