diff options
| author |   Mel Gorman <mgorman@suse.de> | 2013-12-18 17:08:40 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2013-12-18 19:04:51 -0800 |
| commit | 3c67f474558748b604e247d92b55dfe89654c81d (patch) | |
| tree | 501810c12c591b51393b01c8271c2837c95c618a /kernel | |
| parent | mm: numa: avoid unnecessary work on the failure path (diff) | |
| download | linux-dev-3c67f474558748b604e247d92b55dfe89654c81d.tar.xz linux-dev-3c67f474558748b604e247d92b55dfe89654c81d.zip | |
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>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/fair.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 9030da7bcb15..c7395d97e4cb 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -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); |