From: Mel Gorman <[email protected]> Subject: sched: numa: skip inaccessible VMAs
Inaccessible VMA should not be trapping NUMA hint faults. Skip them. Signed-off-by: Mel Gorman <[email protected]> Reviewed-by: Rik van Riel <[email protected]> Cc: Alex Thorlton <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> --- kernel/sched/fair.c | 7 +++++++ 1 file changed, 7 insertions(+) diff -puN kernel/sched/fair.c~sched-numa-skip-inaccessible-vmas kernel/sched/fair.c --- a/kernel/sched/fair.c~sched-numa-skip-inaccessible-vmas +++ a/kernel/sched/fair.c @@ -1738,6 +1738,13 @@ void task_numa_work(struct callback_head (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); _ -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
