diff options
| author | KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> | 2014-08-28 19:34:22 +0100 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-09-26 11:51:52 +0200 |
| commit | 0a0809a87b57b648be1dec3c311a5bfb34ea3b14 (patch) | |
| tree | 31eba818b868dfd1a8464639f29bfb61c8f0e66d /mm/page_alloc.c | |
| parent | cd5900b2c8e9b9a4c71541d7ec158a3b579cbb67 (diff) | |
mm: get rid of unnecessary overhead of trace_mm_page_alloc_extfrag()
commit 52c8f6a5aeb0bdd396849ecaa72d96f8175528f5 upstream.
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>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'mm/page_alloc.c')
| -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 8b010ca23361..e285eaca2ba9 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1118,9 +1118,8 @@ __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; } |