linux-kernel - [PATCH 12/15] Clear numa on mprotect

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Date:	Tue,  3 Dec 2013 08:51:59 +0000
From:	Mel Gorman <mgorman@...e.de>
To:	Alex Thorlton <athorlton@....com>
Cc:	Rik van Riel <riel@...hat.com>, Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>, Mel Gorman <mgorman@...e.de>
Subject: [PATCH 12/15] Clear numa on mprotect

---
 mm/huge_memory.c | 2 ++
 mm/mprotect.c    | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 98b6a79..fa277fa 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1484,6 +1484,8 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
 
 		if (!prot_numa) {
 			entry = pmdp_get_and_clear(mm, addr, pmd);
+			if (pmd_numa(entry))
+				entry = pmd_mknonnuma(entry);
 			entry = pmd_modify(entry, newprot);
 			BUG_ON(pmd_write(entry));
 			set_pmd_at(mm, addr, pmd, entry);
diff --git a/mm/mprotect.c b/mm/mprotect.c
index c53e332..510f138 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -54,6 +54,8 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
 
 			if (!prot_numa) {
 				ptent = ptep_modify_prot_start(mm, addr, pte);
+				if (pte_numa(ptent))
+					ptent = pte_mknonnuma(ptent);
 				ptent = pte_modify(ptent, newprot);
 				updated = true;
 			} else {
-- 
1.8.4

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