diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2013-06-05 17:14:04 -0700 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-06-20 16:55:07 +1000 |
| commit | a6bf2bb03e5bad7e9289d80ecb5faac11630c7ab (patch) | |
| tree | 48cd9fb8de2bc5e0fe66e7e67205efe8ab47d78e /mm/huge_memory.c | |
| parent | 6b0b50b0617fad5f2af3b928596a25f7de8dbf50 (diff) | |
mm/THP: withdraw the pgtable after pmdp related operations
For architectures like ppc64 we look at deposited pgtable when calling
pmdp_get_and_clear. So do the pgtable_trans_huge_withdraw after finishing
pmdp related operations.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'mm/huge_memory.c')
| -rw-r--r-- | mm/huge_memory.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 6b785e17b679..5c4fac2d239e 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1360,9 +1360,15 @@ int zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, struct page *page; pgtable_t pgtable; pmd_t orig_pmd; - pgtable = pgtable_trans_huge_withdraw(tlb->mm, pmd); + /* + * For architectures like ppc64 we look at deposited pgtable + * when calling pmdp_get_and_clear. So do the + * pgtable_trans_huge_withdraw after finishing pmdp related + * operations. + */ orig_pmd = pmdp_get_and_clear(tlb->mm, addr, pmd); tlb_remove_pmd_tlb_entry(tlb, pmd, addr); + pgtable = pgtable_trans_huge_withdraw(tlb->mm, pmd); if (is_huge_zero_pmd(orig_pmd)) { tlb->mm->nr_ptes--; spin_unlock(&tlb->mm->page_table_lock); |