linux-kernel - [PATCH 1/8] Fix interleaving for transparent hugepages v2

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Date:	Wed,  2 Mar 2011 16:45:21 -0800
From:	Andi Kleen <andi@...stfloor.org>
To:	akpm@...ux-foundation.org
Cc:	aarcange@...hat.com, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 1/8] Fix interleaving for transparent hugepages v2

From: Andi Kleen <ak@...ux.intel.com>

Bugfix, independent from the rest of the series.

The THP code didn't pass the correct interleaving shift to the memory
policy code. Fix this here by adjusting for the order.

v2: Use + (thanks Christoph)
Acked-by: Andrea Arcangeli <aarcange@...hat.com>
Reviewed-by: Christoph Lameter <cl@...ux.com>
Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
 mm/mempolicy.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 368fc9d..49355a9 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1830,7 +1830,7 @@ alloc_pages_vma(gfp_t gfp, int order, struct vm_area_struct *vma,
 	if (unlikely(pol->mode == MPOL_INTERLEAVE)) {
 		unsigned nid;
 
-		nid = interleave_nid(pol, vma, addr, PAGE_SHIFT);
+		nid = interleave_nid(pol, vma, addr, PAGE_SHIFT + order);
 		mpol_cond_put(pol);
 		page = alloc_page_interleave(gfp, order, nid);
 		put_mems_allowed();
-- 
1.7.4

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