mm: update the description for vm_total_pages
vm_total_pages is calculated by nr_free_pagecache_pages(), which counts the number of pages which are beyond the high watermark within all zones. So vm_total_pages is not equal to total number of pages which the VM controls. Signed-off-by: Wang Sheng-Hui <shhuiw@gmail.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -137,7 +137,11 @@ struct scan_control {
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* From 0 .. 100. Higher means more swappy.
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*/
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int vm_swappiness = 60;
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unsigned long vm_total_pages; /* The total number of pages which the VM controls */
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/*
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* The total number of pages which are beyond the high watermark within all
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* zones.
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*/
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unsigned long vm_total_pages;
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static LIST_HEAD(shrinker_list);
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static DECLARE_RWSEM(shrinker_rwsem);
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