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| author | Hugh Dickins | 2016-12-13 01:44:47 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2016-12-13 03:55:09 +0100 |
| commit | a66c0410b97c07a5708881198528ce724f7a3226 (patch) | |
| tree | b96317b18326a7c565d257d8694777069c8016c0 /fs/proc/task_mmu.c | |
| parent | mm: add three more cond_resched() in swapoff (diff) | |
| download | kernel-qcow2-linux-a66c0410b97c07a5708881198528ce724f7a3226.tar.gz kernel-qcow2-linux-a66c0410b97c07a5708881198528ce724f7a3226.tar.xz kernel-qcow2-linux-a66c0410b97c07a5708881198528ce724f7a3226.zip | |
mm: add cond_resched() in gather_pte_stats()
The other pagetable walks in task_mmu.c have a cond_resched() after
walking their ptes: add a cond_resched() in gather_pte_stats() too, for
reading /proc/<id>/numa_maps. Only pagemap_pmd_range() has a
cond_resched() in its (unusually expensive) pmd_trans_huge case: more
should probably be added, but leave them unchanged for now.
Link: http://lkml.kernel.org/r/alpine.LSU.2.11.1612052157400.13021@eggly.anvils
Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc/task_mmu.c')
| -rw-r--r-- | fs/proc/task_mmu.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 35b92d81692f..958f32545064 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -1588,6 +1588,7 @@ static int gather_pte_stats(pmd_t *pmd, unsigned long addr, } while (pte++, addr += PAGE_SIZE, addr != end); pte_unmap_unlock(orig_pte, ptl); + cond_resched(); return 0; } #ifdef CONFIG_HUGETLB_PAGE |