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authorMel Gorman <mel@csn.ul.ie>2009-06-16 15:32:14 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-16 19:47:35 -0700
commit974709bdb2a34db378fc84140220f363f558d0d6 (patch)
tree2b63a089cc077579e3b67efba1995c71102db2e2 /mm/page_alloc.c
parentf2260e6b1f4eba0f5b5906795117791b5c660154 (diff)
downloadconfigs-974709bdb2a34db378fc84140220f363f558d0d6.tar.gz
page allocator: get the pageblock migratetype without disabling interrupts
Local interrupts are disabled when freeing pages to the PCP list. Part of that free checks what the migratetype of the pageblock the page is in but it checks this with interrupts disabled and interupts should never be disabled longer than necessary. This patch checks the pagetype with interrupts enabled with the impact that it is possible a page is freed to the wrong list when a pageblock changes type. As that block is now already considered mixed from an anti-fragmentation perspective, it's not of vital importance. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r--mm/page_alloc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d56e377ad08..e60e4147433 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1030,6 +1030,7 @@ static void free_hot_cold_page(struct page *page, int cold)
kernel_map_pages(page, 1, 0);
pcp = &zone_pcp(zone, get_cpu())->pcp;
+ set_page_private(page, get_pageblock_migratetype(page));
local_irq_save(flags);
if (unlikely(clearMlocked))
free_page_mlock(page);
@@ -1039,7 +1040,6 @@ static void free_hot_cold_page(struct page *page, int cold)
list_add_tail(&page->lru, &pcp->list);
else
list_add(&page->lru, &pcp->list);
- set_page_private(page, get_pageblock_migratetype(page));
pcp->count++;
if (pcp->count >= pcp->high) {
free_pages_bulk(zone, pcp->batch, &pcp->list, 0);