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| author |   Mel Gorman <mgorman@suse.de> | 2013-12-18 17:08:36 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2013-12-18 19:04:51 -0800 |
| commit | 5a6dac3ec5f583cc8ee7bc53b5500a207c4ca433 (patch) | |
| tree | 471c00fcd2c7666cdf91132c6557efb34264ace6 /mm/mprotect.c | |
| parent | mm: clear pmd_numa before invalidating (diff) | |
| download | wireguard-linux-5a6dac3ec5f583cc8ee7bc53b5500a207c4ca433.tar.xz wireguard-linux-5a6dac3ec5f583cc8ee7bc53b5500a207c4ca433.zip | |
mm: numa: do not clear PMD during PTE update scan
If the PMD is flushed then a parallel fault in handle_mm_fault() will
enter the pmd_none and do_huge_pmd_anonymous_page() path where it'll
attempt to insert a huge zero page. This is wasteful so the patch
avoids clearing the PMD when setting pmd_numa.
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 'mm/mprotect.c')
0 files changed, 0 insertions, 0 deletions