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| author | KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> | 2013-11-12 15:08:19 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-13 12:09:10 +0900 |
| commit | 52c8f6a5aeb0bdd396849ecaa72d96f8175528f5 (patch) | |
| tree | 396299d23b3bf478770d4030000851ebd29223cf /mm | |
| parent | 5d0f3f72efb1c1968ce1f56c58f9e3e6495effa6 (diff) | |
| download | linux-52c8f6a5aeb0bdd396849ecaa72d96f8175528f5.tar.bz2 | |
mm: get rid of unnecessary overhead of trace_mm_page_alloc_extfrag()
In general, every tracepoint should be zero overhead if it is disabled.
However, trace_mm_page_alloc_extfrag() is one of exception. It evaluate
"new_type == start_migratetype" even if tracepoint is disabled.
However, the code can be moved into tracepoint's TP_fast_assign() and
TP_fast_assign exist exactly such purpose. This patch does it.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/page_alloc.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 5a9883614d99..442f1298f9a7 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1103,9 +1103,8 @@ __rmqueue_fallback(struct zone *zone, int order, int start_migratetype) is_migrate_cma(migratetype) ? migratetype : start_migratetype); - trace_mm_page_alloc_extfrag(page, order, - current_order, start_migratetype, migratetype, - new_type == start_migratetype); + trace_mm_page_alloc_extfrag(page, order, current_order, + start_migratetype, migratetype, new_type); return page; } |