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| author | Joonsoo Kim <iamjoonsoo.kim@lge.com> | 2016-05-19 17:12:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-19 19:12:14 -0700 |
| commit | 9d43f5aec9506d98ad492a783aa8a18226c5d474 (patch) | |
| tree | 00526bcdc2d2cb1072f60393aca984af20e4fcdb /mm/page_owner.c | |
| parent | a91c43c7313a995a8908f8f6b911a85d00fdbffd (diff) | |
| download | linux-rpi3-9d43f5aec9506d98ad492a783aa8a18226c5d474.tar.gz linux-rpi3-9d43f5aec9506d98ad492a783aa8a18226c5d474.tar.bz2 linux-rpi3-9d43f5aec9506d98ad492a783aa8a18226c5d474.zip | |
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@lge.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Laura Abbott <lauraa@codeaurora.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_owner.c')
| -rw-r--r-- | mm/page_owner.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/page_owner.c b/mm/page_owner.c index ac3d8d129974..438768c092ac 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -301,6 +301,9 @@ static void init_pages_in_zone(pg_data_t *pgdat, struct zone *zone) 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. |