pmdp_invalidate clears the present bit without taking into account that it
might be in the _PAGE_NUMA bit leaving the PMD in an unexpected state. Clear
pmd_numa before invalidating.
Cc: sta...@vger.kernel.org
Signed-off-by: Mel Gorman <mgor...@suse.de>
Reviewed-by: Rik van Riel <r...@redhat.com>
---
mm/pgtable-generic.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c
index cbb3854..e84cad2 100644
--- a/mm/pgtable-generic.c
+++ b/mm/pgtable-generic.c
@@ -191,6 +191,9 @@ pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm,
pmd_t *pmdp)
void pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
pmd_t *pmdp)
{
+ pmd_t entry = *pmdp;
+ if (pmd_numa(entry))
+ entry = pmd_mknonnuma(entry);
set_pmd_at(vma->vm_mm, address, pmdp, pmd_mknotpresent(*pmdp));
flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
}
--
1.8.4
--
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