The patch titled
Subject: mm: fix off-by-two in __zone_watermark_ok()
has been removed from the -mm tree. Its filename was
mm-fix-off-by-two-in-__zone_watermark_ok.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
From: Michal Hocko <mhocko@xxxxxxx>
Subject: mm: fix off-by-two in __zone_watermark_ok()
88f5acf8 ("mm: page allocator: adjust the per-cpu counter threshold when
memory is low") changed the form how free_pages is calculated but it
forgot that we used to do free_pages - ((1 << order) - 1) so we ended up
with off-by-two when calculating free_pages.
Reported-by: Wang Sheng-Hui <shhuiw@xxxxxxxxx>
Signed-off-by: Michal Hocko <mhocko@xxxxxxx>
Acked-by: Mel Gorman <mgorman@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/page_alloc.c~mm-fix-off-by-two-in-__zone_watermark_ok mm/page_alloc.c
--- a/mm/page_alloc.c~mm-fix-off-by-two-in-__zone_watermark_ok
+++ a/mm/page_alloc.c
@@ -1525,7 +1525,7 @@ static bool __zone_watermark_ok(struct z
long min = mark;
int o;
- free_pages -= (1 << order) + 1;
+ free_pages -= (1 << order) - 1;
if (alloc_flags & ALLOC_HIGH)
min -= min / 2;
if (alloc_flags & ALLOC_HARDER)
_
Patches currently in -mm which might be from mhocko@xxxxxxx are
origin.patch
mm-hugetlb-undo-change-to-page-mapcount-in-fault-handler.patch
memcg-add-mem_cgroup_replace_page_cache-to-fix-lru-issue.patch
mm-memcg-consolidate-hierarchy-iteration-primitives.patch
mm-vmscan-distinguish-global-reclaim-from-global-lru-scanning.patch
mm-vmscan-distinguish-between-memcg-triggering-reclaim-and-memcg-being-scanned.patch
mm-memcg-per-priority-per-zone-hierarchy-scan-generations.patch
mm-move-memcg-hierarchy-reclaim-to-generic-reclaim-code.patch
mm-memcg-remove-optimization-of-keeping-the-root_mem_cgroup-lru-lists-empty.patch
mm-vmscan-convert-global-reclaim-to-per-memcg-lru-lists.patch
mm-collect-lru-list-heads-into-struct-lruvec.patch
mm-make-per-memcg-lru-lists-exclusive.patch
mm-memcg-remove-unused-node-section-info-from-pc-flags.patch
mm-memcg-remove-unused-node-section-info-from-pc-flags-fix.patch
memcg-make-mem_cgroup_split_huge_fixup-more-efficient.patch
memcg-make-mem_cgroup_split_huge_fixup-more-efficient-fix.patch
memcg-fix-pgpgin-pgpgout-documentation.patch
mm-oom_kill-remove-memcg-argument-from-oom_kill_task.patch
mm-unify-remaining-mem_cont-mem-etc-variable-names-to-memcg.patch
mm-memcg-clean-up-fault-accounting.patch
mm-memcg-lookup_page_cgroup-almost-never-returns-null.patch
mm-memcg-lookup_page_cgroup-almost-never-returns-null-fix.patch
mm-page_cgroup-check-page_cgroup-arrays-in-lookup_page_cgroup-only-when-necessary.patch
mm-memcg-remove-unneeded-checks-from-newpage_charge.patch
mm-memcg-remove-unneeded-checks-from-uncharge_page.patch
page_cgroup-add-helper-function-to-get-swap_cgroup.patch
page_cgroup-add-helper-function-to-get-swap_cgroup-cleanup.patch
memcg-clean-up-soft_limit_tree-if-allocation-fails.patch
oom-memcg-fix-exclusion-of-memcg-threads-after-they-have-detached-their-mm.patch
memcg-simplify-page-cache-charging.patch
memcg-simplify-corner-case-handling-of-lru.patch
memcg-clear-pc-mem_cgorup-if-necessary.patch
memcg-clear-pc-mem_cgorup-if-necessary-fix.patch
memcg-clear-pc-mem_cgorup-if-necessary-fix-2.patch
memcg-clear-pc-mem_cgorup-if-necessary-fix-2-fix.patch
memcg-clear-pc-mem_cgorup-if-necessary-fix-3.patch
memcg-clear-pc-mem_cgorup-if-necessary-fix-page-migration-to-reset_owner.patch
memcg-simplify-lru-handling-by-new-rule.patch
memcg-simplify-lru-handling-by-new-rule-fix.patch
memcg-simplify-lru-handling-by-new-rule-memcg-return-eintr-at-bypassing-try_charge.patch
memcg-simplify-lru-handling-by-new-rule-memcg-return-eintr-at-bypassing-try_charge-fix.patch
memcg-simplify-lru-handling-by-new-rule-memcg-return-eintr-at-bypassing-try_charge-fix-null-mem_cgroup_try_charge.patch
memcg-cleanup-for_each_node_state.patch
page_alloc-break-early-in-check_for_regular_memory.patch
page_cgroup-drop-multi-config_memory_hotplug.patch
memcg-fix-split_huge_page_refcounts.patch
memcg-fix-mem_cgroup_print_bad_page.patch
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