The patch titled
Subject: mm/page_owner: add zone range overlapping check
has been added to the -mm tree. Its filename is
mm-page_owner-add-zone-range-overlapping-check.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-page_owner-add-zone-range-overlapping-check.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-page_owner-add-zone-range-overlapping-check.patch
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------------------------------------------------------
From: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Subject: mm/page_owner: add zone range overlapping check
There is a system thats node's pfns are overlapped as follows:
-----pfn-------->
N0 N1 N2 N0 N1 N2
Therefore, we need to care this overlapping when iterating pfn range.
There are one place in page_owner.c that iterates pfn range and
it doesn't consider this overlapping. Add it.
Without this patch, above system could over count early allocated
page number before page_owner is activated.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Laura Abbott <lauraa@xxxxxxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Cc: Michal Nazarewicz <mina86@xxxxxxxxxx>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_owner.c | 3 +++
1 file changed, 3 insertions(+)
diff -puN mm/page_owner.c~mm-page_owner-add-zone-range-overlapping-check mm/page_owner.c
--- a/mm/page_owner.c~mm-page_owner-add-zone-range-overlapping-check
+++ a/mm/page_owner.c
@@ -301,6 +301,9 @@ static void init_pages_in_zone(pg_data_t
page = pfn_to_page(pfn);
+ if (page_zone(page) != zone)
+ continue;
+
/*
* We are safe to check buddy flag and order, because
* this is init stage and only single thread runs.
_
Patches currently in -mm which might be from iamjoonsoo.kim@xxxxxxx are
mm-slab-hold-a-slab_mutex-when-calling-__kmem_cache_shrink.patch
mm-slab-remove-bad_alien_magic-again.patch
mm-slab-drain-the-free-slab-as-much-as-possible.patch
mm-slab-factor-out-kmem_cache_node-initialization-code.patch
mm-slab-clean-up-kmem_cache_node-setup.patch
mm-slab-dont-keep-free-slabs-if-free_objects-exceeds-free_limit.patch
mm-slab-racy-access-modify-the-slab-color.patch
mm-slab-make-cache_grow-handle-the-page-allocated-on-arbitrary-node.patch
mm-slab-separate-cache_grow-to-two-parts.patch
mm-slab-refill-cpu-cache-through-a-new-slab-without-holding-a-node-lock.patch
mm-slab-lockless-decision-to-grow-cache.patch
mm-page_ref-use-page_ref-helper-instead-of-direct-modification-of-_count.patch
mm-rename-_count-field-of-the-struct-page-to-_refcount.patch
mm-rename-_count-field-of-the-struct-page-to-_refcount-fix-fix-fix.patch
mm-hugetlb-add-same-zone-check-in-pfn_range_valid_gigantic.patch
mm-memory_hotplug-add-comment-to-some-functions-related-to-memory-hotplug.patch
mm-vmstat-add-zone-range-overlapping-check.patch
mm-page_owner-add-zone-range-overlapping-check.patch
power-add-zone-range-overlapping-check.patch
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