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authorAndrew Morton <akpm@linux-foundation.org>2009-01-06 14:40:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-06 15:59:08 -0800
commitb555749aac87d7c2637f153e44bd77c7fdf4c65b (patch)
treeb65a437fd70795eac749f5dcf327151d458ec742 /mm/vmscan.c
parent1e9e63650d6cb88e6d6d2ca6cc3ee276c26de4a3 (diff)
downloadlwn-b555749aac87d7c2637f153e44bd77c7fdf4c65b.tar.gz
lwn-b555749aac87d7c2637f153e44bd77c7fdf4c65b.zip
vmscan: shrink_active_list(): reduce lru_lock hold time
These three statements manipulate local variables and do not need the lock coverage. Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com> Cc: Rik van Riel <riel@redhat.com Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmscan.c')
-rw-r--r--mm/vmscan.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 466a36b3bada..5daf606e0a35 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1237,6 +1237,13 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
list_add(&page->lru, &l_inactive);
}
+ /*
+ * Move the pages to the [file or anon] inactive list.
+ */
+ pagevec_init(&pvec, 1);
+ pgmoved = 0;
+ lru = LRU_BASE + file * LRU_FILE;
+
spin_lock_irq(&zone->lru_lock);
/*
* Count referenced pages from currently used mappings as
@@ -1247,13 +1254,6 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
if (scan_global_lru(sc))
zone->recent_rotated[!!file] += pgmoved;
- /*
- * Move the pages to the [file or anon] inactive list.
- */
- pagevec_init(&pvec, 1);
-
- pgmoved = 0;
- lru = LRU_BASE + file * LRU_FILE;
while (!list_empty(&l_inactive)) {
page = lru_to_page(&l_inactive);
prefetchw_prev_lru_page(page, &l_inactive, flags);