From 3d792d616ba408ab55a54c1bb75a9367d997acfa Mon Sep 17 00:00:00 2001 From: Mel Gorman Date: Tue, 7 Jan 2014 14:00:44 +0000 Subject: mm: numa: clear numa hinting information on mprotect commit 1667918b6483b12a6496bf54151b827b8235d7b1 upstream. On a protection change it is no longer clear if the page should be still accessible. This patch clears the NUMA hinting fault bits on a protection change. Signed-off-by: Mel Gorman Reviewed-by: Rik van Riel Cc: Alex Thorlton Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- mm/huge_memory.c | 2 ++ mm/mprotect.c | 2 ++ 2 files changed, 4 insertions(+) (limited to 'mm') diff --git a/mm/huge_memory.c b/mm/huge_memory.c index a458517187c4..40f4ceb979fd 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1483,6 +1483,8 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, pmd_t entry; 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 3277121e032e..00edb758f7d5 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -56,6 +56,8 @@ 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 { -- cgit v1.2.3