Remove unlikely(order), because we are sure order is not zero if
code reach here, also add if (page == NULL), only allocate page again if
__rmqueue_smallest() failed or alloc_flags & ALLOC_HARDER == 0
Signed-off-by: yalin wang <yalin.wang2...@gmail.com>
---
mm/page_alloc.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 0d6f540..de82e2c 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2241,13 +2241,13 @@ struct page *buffered_rmqueue(struct zone
*preferred_zone,
spin_lock_irqsave(&zone->lock, flags);
page = NULL;
- if (unlikely(order) && (alloc_flags & ALLOC_HARDER)) {
+ if (alloc_flags & ALLOC_HARDER) {
page = __rmqueue_smallest(zone, order,
MIGRATE_HIGHATOMIC);
if (page)
trace_mm_page_alloc_zone_locked(page, order,
migratetype);
}
-
- page = __rmqueue(zone, order, migratetype, gfp_flags);
+ if (page == NULL)
+ page = __rmqueue(zone, order, migratetype, gfp_flags);
spin_unlock(&zone->lock);
if (!page)
goto failed;
--
1.9.1
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