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authorVlastimil Babka <vbabka@suse.cz>2014-01-22 00:51:07 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-22 01:19:48 +0100
commitde6c60a6c115acaa721cfd499e028a413d1fcbf3 (patch)
tree81277ea0bf611f37544dbb0a22e4eff3fc2a9aa8 /mm/page_alloc.c
parentmm: compaction: trace compaction begin and end (diff)
downloadlinux-de6c60a6c115acaa721cfd499e028a413d1fcbf3.tar.xz
linux-de6c60a6c115acaa721cfd499e028a413d1fcbf3.zip
mm: compaction: encapsulate defer reset logic
Currently there are several functions to manipulate the deferred compaction state variables. The remaining case where the variables are touched directly is when a successful allocation occurs in direct compaction, or is expected to be successful in the future by kswapd. Here, the lowest order that is expected to fail is updated, and in the case of successful allocation, the deferred status and counter is reset completely. Create a new function compaction_defer_reset() to encapsulate this functionality and make it easier to understand the code. No functional change. Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Mel Gorman <mgorman@suse.de> Reviewed-by: Rik van Riel <riel@redhat.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
-rw-r--r--mm/page_alloc.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index b230e838883d..84da0e3bc886 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2235,10 +2235,7 @@ __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order,
preferred_zone, migratetype);
if (page) {
preferred_zone->compact_blockskip_flush = false;
- preferred_zone->compact_considered = 0;
- preferred_zone->compact_defer_shift = 0;
- if (order >= preferred_zone->compact_order_failed)
- preferred_zone->compact_order_failed = order + 1;
+ compaction_defer_reset(preferred_zone, order, true);
count_vm_event(COMPACTSUCCESS);
return page;
}