Messages in this thread Patch in this message | | | From | Mel Gorman <> | Subject | [PATCH 01/28] mm, page_alloc: Use ac->classzone_idx instead of zone_idx(preferred_zone) | Date | Tue, 12 Apr 2016 11:25:56 +0100 |
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ac->classzone_idx is determined by the index of the preferred zone and cached to avoid repeated calculations. wake_all_kswapds() should use it instead of using zone_idx() within a loop.
Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> --- mm/page_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 4d4079309760..e551f697bc68 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3139,7 +3139,7 @@ static void wake_all_kswapds(unsigned int order, const struct alloc_context *ac) for_each_zone_zonelist_nodemask(zone, z, ac->zonelist, ac->high_zoneidx, ac->nodemask) - wakeup_kswapd(zone, order, zonelist_zone_idx(ac->preferred_zoneref)); + wakeup_kswapd(zone, order, ac->classzone_idx); } static inline unsigned int -- 2.6.4
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