mm/writeback: correct dirty page calculation for highmem
ZONE_MOVABLE could be treated as highmem so we need to consider it for accurate calculation of dirty pages. And, in following patches, ZONE_CMA will be introduced and it can be treated as highmem, too. So, instead of manually adding stat of ZONE_MOVABLE, looping all zones and check whether the zone is highmem or not and add stat of the zone which can be treated as highmem. Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Rik van Riel <riel@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Mel Gorman <mgorman@suse.de> 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: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -296,11 +296,15 @@ static unsigned long highmem_dirtyable_memory(unsigned long total)
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#ifdef CONFIG_HIGHMEM
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int node;
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unsigned long x = 0;
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int i;
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for_each_node_state(node, N_HIGH_MEMORY) {
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struct zone *z = &NODE_DATA(node)->node_zones[ZONE_HIGHMEM];
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for (i = 0; i < MAX_NR_ZONES; i++) {
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struct zone *z = &NODE_DATA(node)->node_zones[i];
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x += zone_dirtyable_memory(z);
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if (is_highmem(z))
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x += zone_dirtyable_memory(z);
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}
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}
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/*
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* Unreclaimable memory (kernel memory or anonymous memory
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