Commit 3c67f474 authored Dec 18, 2013 by Mel Gorman Committed by Linus Torvalds Dec 18, 2013

sched: numa: skip inaccessible VMAs



Inaccessible VMA should not be trapping NUMA hint faults. Skip them.

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 eb4489f6

kernel/sched/fair.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -1738,6 +1738,13 @@ void task_numa_work(struct callback_head *work)
		(vma->vm_file && (vma->vm_flags & (VM_READ\|VM_WRITE)) == (VM_READ)))
		continue;

		/*
		* Skip inaccessible VMAs to avoid any confusion between
		* PROT_NONE and NUMA hinting ptes
		*/
		if (!(vma->vm_flags & (VM_READ \| VM_EXEC \| VM_WRITE)))
		continue;

		do {
		start = max(start, vma->vm_start);
		end = ALIGN(start + (pages << PAGE_SHIFT), HPAGE_SIZE);