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

[Mel Gorman]

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@xxxxxxx>
---
 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

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