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mm: update the description for vm_total_pages

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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 <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Johannes Weiner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Wang Sheng-Hui 2014-08-06 16:07:07 -07:00 • committed by Linus Torvalds
commit d0480be44a
1 changed files with 5 additions and 1 deletions
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6
mm/vmscan.c
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@ -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);