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| author |   Wang Sheng-Hui <shhuiw@gmail.com> | 2014-08-06 16:07:07 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-06 18:01:20 -0700 |
| commit | d0480be44a90af81a425f426c9107fb8f0899f65 (patch) | |
| tree | 0d2a5b630d185a1cf3176dec29ee3cd4f256dfd0 /mm/vmscan.c | |
| parent | mm/memory.c: don't forget to set softdirty on file mapped fault (diff) | |
| download | linux-dev-d0480be44a90af81a425f426c9107fb8f0899f65.tar.xz linux-dev-d0480be44a90af81a425f426c9107fb8f0899f65.zip | |
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>
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 81dd858b9d17..5fec1ba9951f 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -137,7 +137,11 @@ struct scan_control { * From 0 .. 100. Higher means more swappy. */ int vm_swappiness = 60; -unsigned long vm_total_pages; /* The total number of pages which the VM controls */ +/* + * The total number of pages which are beyond the high watermark within all + * zones. + */ +unsigned long vm_total_pages; static LIST_HEAD(shrinker_list); static DECLARE_RWSEM(shrinker_rwsem); |