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Date: Wed, 8 May 2013 17:02:46 +0100 From: Mel Gorman <mgorman@...e.de> To: Linux-MM <linux-mm@...ck.org> Cc: Johannes Weiner <hannes@...xchg.org>, Dave Hansen <dave@...1.net>, Christoph Lameter <cl@...ux.com>, LKML <linux-kernel@...r.kernel.org>, Mel Gorman <mgorman@...e.de> Subject: [PATCH 01/22] mm: page allocator: Lookup pageblock migratetype with IRQs enabled during free 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@...e.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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