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[PATCH] vmscan: no zone_reclaim if PF_MALLOC is set
If the process has already set PF_MALLOC and is already using current->reclaim_state then do not try to reclaim memory from the zone. This is set by kswapd and/or synchrononous global reclaim which will not take it lightly if we zap the reclaim_state. Signed-off-by: Christoph Lameter <clameter@sig.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -1883,7 +1883,8 @@ int zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
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if (!(gfp_mask & __GFP_WAIT) ||
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zone->all_unreclaimable ||
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atomic_read(&zone->reclaim_in_progress) > 0)
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atomic_read(&zone->reclaim_in_progress) > 0 ||
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(p->flags & PF_MEMALLOC))
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return 0;
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node_id = zone->zone_pgdat->node_id;
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