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Commit 1667918b authored Dec 18, 2013 by Mel Gorman Committed by Linus Torvalds Dec 18, 2013

mm: numa: clear numa hinting information on mprotect

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 <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 3c67f474

mm/huge_memory.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1532,6 +1532,8 @@ int change_huge_pmd(struct vm_area_struct vma, pmd_t pmd,
		ret = 1;
		if (!prot_numa) {
		entry = pmdp_get_and_clear(mm, addr, pmd);
		if (pmd_numa(entry))
		entry = pmd_mknonnuma(entry);
		entry = pmd_modify(entry, newprot);
		ret = HPAGE_PMD_NR;
		BUG_ON(pmd_write(entry));

mm/mprotect.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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 {