The patch titled
Subject: mm: add cond_resched() in gather_pte_stats()
has been added to the -mm tree. Its filename is
mm-add-cond_resched-in-gather_pte_stats.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-add-cond_resched-in-gather_pte_stats.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-add-cond_resched-in-gather_pte_stats.patch
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------------------------------------------------------
From: Hugh Dickins <hughd@xxxxxxxxxx>
Subject: 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@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Gerald Schaefer <gerald.schaefer@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/task_mmu.c | 1 +
1 file changed, 1 insertion(+)
diff -puN fs/proc/task_mmu.c~mm-add-cond_resched-in-gather_pte_stats fs/proc/task_mmu.c
--- a/fs/proc/task_mmu.c~mm-add-cond_resched-in-gather_pte_stats
+++ a/fs/proc/task_mmu.c
@@ -1588,6 +1588,7 @@ static int gather_pte_stats(pmd_t *pmd,
} while (pte++, addr += PAGE_SIZE, addr != end);
pte_unmap_unlock(orig_pte, ptl);
+ cond_resched();
return 0;
}
#ifdef CONFIG_HUGETLB_PAGE
_
Patches currently in -mm which might be from hughd@xxxxxxxxxx are
mm-add-three-more-cond_resched-in-swapoff.patch
mm-add-cond_resched-in-gather_pte_stats.patch
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