[PATCH 01/22] mm: page allocator: Lookup pageblock migratetype with IRQs enabled during free

Mel Gorman
2013-05-08T16:03:18Z

get_pageblock_migratetype() is called during free with IRQs disabled.
This is unnecessary and disables IRQs for longer than necessary.

Signed-off-by: Mel Gorman <mgorman@suse.de>
---
mm/page_alloc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 8fcced7..277ecee 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -730,9 +730,10 @@ static void __free_pages_ok(struct page *page, unsigned int order)
if (!free_pages_prepare(page, order))
return;

+ migratetype = get_pageblock_migratetype(page);
+
local_irq_save(flags);
__count_vm_events(PGFREE, 1 << order);
- migratetype = get_pageblock_migratetype(page);
set_freepage_migratetype(page, migratetype);
free_one_page(page_zone(page), page, order, migratetype);
local_irq_restore(flags);
--
1.8.1.4