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| author | Scott Wood <scottwood@freescale.com> | 2015-04-10 19:37:34 -0500 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2015-04-15 15:24:22 -0500 |
| commit | 50c6a665b383cb5839e45d04e36faeeefaffa052 (patch) | |
| tree | 300d70280629baa31706090fdb6806e5d3bce237 | |
| parent | 39a8804455fb23f09157341d3ba7db6d7ae6ee76 (diff) | |
| download | linux-50c6a665b383cb5839e45d04e36faeeefaffa052.tar.bz2 | |
powerpc/hugetlb: Call mm_dec_nr_pmds() in hugetlb_free_pmd_range()
Commit dc6c9a35b66b5 ("mm: account pmd page tables to the process")
added a counter that is incremented whenever a PMD is allocated and
decremented whenever a PMD is freed. For hugepages on PPC, common code
is used to allocated PMDs, but arch-specific code is used to free PMDs.
This results in kernel output such as "BUG: non-zero nr_pmds on freeing
mm: 1" when using hugepages.
Update the PPC hugepage PMD freeing code to decrement the count, just
as the above commit did for free_pmd_range().
Fixes: dc6c9a35b66b5 ("mm: account pmd page tables to the process")
Signed-off-by: Scott Wood <scottwood@freescale.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org # 4.0.x
| -rw-r--r-- | arch/powerpc/mm/hugetlbpage.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index 7e408bfc7948..cecbe00cee24 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -581,6 +581,7 @@ static void hugetlb_free_pmd_range(struct mmu_gather *tlb, pud_t *pud, pmd = pmd_offset(pud, start); pud_clear(pud); pmd_free_tlb(tlb, pmd, start); + mm_dec_nr_pmds(tlb->mm); } static void hugetlb_free_pud_range(struct mmu_gather *tlb, pgd_t *pgd, |