diff options
| author | Kirill A. Shutemov <[email protected]> | 2017-11-15 17:35:33 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2017-11-15 18:21:04 -0800 |
| commit | b4e98d9ac775907cc53fb08fcb6776deb7694e30 (patch) | |
| tree | 4a82caff5eab86a66f078622acfd68df5ac92235 /arch/powerpc/mm/hugetlbpage.c | |
| parent | 7d6c4dfa4de96d11b9d6adaf5aa5ca8c54670258 (diff) | |
mm: account pud page tables
On a machine with 5-level paging support a process can allocate
significant amount of memory and stay unnoticed by oom-killer and memory
cgroup. The trick is to allocate a lot of PUD page tables. We don't
account PUD page tables, only PMD and PTE.
We already addressed the same issue for PMD page tables, see commit
dc6c9a35b66b ("mm: account pmd page tables to the process").
Introduction of 5-level paging brings the same issue for PUD page
tables.
The patch expands accounting to PUD level.
[[email protected]: s/pmd_t/pud_t/]
Link: http://lkml.kernel.org/r/[email protected]
[[email protected]: s390/mm: fix pud table accounting]
Link: http://lkml.kernel.org/r/[email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Kirill A. Shutemov <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
Acked-by: Rik van Riel <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'arch/powerpc/mm/hugetlbpage.c')
| -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 1571a498a33f..a9b9083c5e49 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -433,6 +433,7 @@ static void hugetlb_free_pud_range(struct mmu_gather *tlb, pgd_t *pgd, pud = pud_offset(pgd, start); pgd_clear(pgd); pud_free_tlb(tlb, pud, start); + mm_dec_nr_puds(tlb->mm); } /* |