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| author | Hugh Dickins <hughd@google.com> | 2016-12-13 03:44:47 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-16 12:59:09 +0300 |
| commit | 700344f145069ea7535c57d8ad2cef881d7bb7da (patch) | |
| tree | 9d7604de4fb8b111051a002fcf6dcb31249c0202 | |
| parent | bd875c16654051bcbfbbdeba116b0477f785a6a0 (diff) | |
| download | linux-700344f145069ea7535c57d8ad2cef881d7bb7da.tar.xz | |
mm: add cond_resched() in gather_pte_stats()
commit a66c0410b97c07a5708881198528ce724f7a3226 upstream.
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>
Reported-by: Chen si <cici.cs@alibaba-inc.com>
Signed-off-by: Baoyou Xie <baoyou.xie@aliyun.com>
Signed-off-by: Wen Yang <wenyang@linux.alibaba.com>
Signed-off-by: Zijiang Huang <zijiang.hzj@alibaba-inc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 4b207b10db03..e6c8eadfaa80 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -1609,6 +1609,7 @@ 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 |