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 d10e63f294 ("mm: numa: Create basic numa page
hinting infrastructure"). Put it back.

Reported-by: Dave Jones <>
Debugged-by: Hillf Danton <>
Acked-by: Andrea Arcangeli <>
Acked-by: Mel Gorman <>
Cc: Kirill Shutemov <>
Signed-off-by: Linus Torvalds <>
Linus Torvalds 10 years ago
parent 08c097fc3b
commit e53289c0c5
  1. 8

@ -3711,6 +3711,14 @@ retry:
if (pmd_trans_huge(orig_pmd)) {
unsigned int dirty = flags & FAULT_FLAG_WRITE;
* If the pmd is splitting, return and retry the
* the fault. Alternative: wait until the split
* is done, and goto retry.
if (pmd_trans_splitting(orig_pmd))
return 0;
if (pmd_numa(orig_pmd))
return do_huge_pmd_numa_page(mm, vma, address,
orig_pmd, pmd);