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[PATCH] VM: add __GFP_NORECLAIM

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When using the early zone reclaim, it was noticed that allocating new pages
that should be spread across the whole system caused eviction of local pages.

This adds a new GFP flag to prevent early reclaim from happening during
certain allocation attempts.  The example that is implemented here is for page
cache pages.  We want page cache pages to be spread across the whole system,
and we don't want page cache pages to evict other pages to get local memory.

Signed-off-by:  Martin Hicks <mort@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Martin Hicks 2005-06-21 17:14:42 -07:00 • committed by Linus Torvalds
parent 753ee72896
commit 0c35bbadc5
3 changed files with 6 additions and 3 deletions
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2
mm/page_alloc.c
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@ -729,6 +729,8 @@ should_reclaim_zone(struct zone *z, unsigned int gfp_mask)
{
if (!z->reclaim_pages)
return 0;
if (gfp_mask & __GFP_NORECLAIM)
return 0;
return 1;
}