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authorLinus Torvalds <torvalds@linux-foundation.org>2013-01-09 11:36:54 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2013-01-09 11:36:54 -0500
commite53289c0c5e5a24e29e571eba7af05c845c10890 (patch)
treefd8852edc6b91152f30b8a7eb0e75fc5ca6750af /mm
parent08c097fc3bb283299a6915a6a3795edab85979b1 (diff)
mm: reinstante dropped pmd_trans_splitting() check
The check for a pmd being in the process of being split was dropped by mistake by commit d10e63f29488 ("mm: numa: Create basic numa page hinting infrastructure"). Put it back. Reported-by: Dave Jones <davej@redhat.com> Debugged-by: Hillf Danton <dhillf@gmail.com> Acked-by: Andrea Arcangeli <aarcange@redhat.com> Acked-by: Mel Gorman <mgorman@suse.de> Cc: Kirill Shutemov <kirill@shutemov.name> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/memory.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/mm/memory.c b/mm/memory.c
index 49fb1cf08611..bb1369f7b9b4 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3711,6 +3711,14 @@ retry:
3711 if (pmd_trans_huge(orig_pmd)) { 3711 if (pmd_trans_huge(orig_pmd)) {
3712 unsigned int dirty = flags & FAULT_FLAG_WRITE; 3712 unsigned int dirty = flags & FAULT_FLAG_WRITE;
3713 3713
3714 /*
3715 * If the pmd is splitting, return and retry the
3716 * the fault. Alternative: wait until the split
3717 * is done, and goto retry.
3718 */
3719 if (pmd_trans_splitting(orig_pmd))
3720 return 0;
3721
3714 if (pmd_numa(orig_pmd)) 3722 if (pmd_numa(orig_pmd))
3715 return do_huge_pmd_numa_page(mm, vma, address, 3723 return do_huge_pmd_numa_page(mm, vma, address,
3716 orig_pmd, pmd); 3724 orig_pmd, pmd);