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mm: introduce zone_reclaim struct

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Add zone_reclam_stat struct for later enhancement.

A later patch uses this.  This patch doesn't any behavior change (yet).

Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
KOSAKI Motohiro 2009-01-07 18:08:15 -08:00 • committed by Linus Torvalds
parent f89eb90e33
commit 6e9015716a
4 changed files with 56 additions and 35 deletions
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24
include/linux/mmzone.h
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@ -263,6 +263,19 @@ enum zone_type {
#error ZONES_SHIFT -- too many zones configured adjust calculation
#endif
struct zone_reclaim_stat {
/*
* The pageout code in vmscan.c keeps track of how many of the
* mem/swap backed and file backed pages are refeferenced.
* The higher the rotated/scanned ratio, the more valuable
* that cache is.
*
* The anon LRU stats live in [0], file LRU stats in [1]
*/
unsigned long recent_rotated[2];
unsigned long recent_scanned[2];
};
struct zone {
/* Fields commonly accessed by the page allocator */
unsigned long pages_min, pages_low, pages_high;
@ -315,16 +328,7 @@ struct zone {
unsigned long nr_scan;
} lru[NR_LRU_LISTS];
/*
* The pageout code in vmscan.c keeps track of how many of the
* mem/swap backed and file backed pages are refeferenced.
* The higher the rotated/scanned ratio, the more valuable
* that cache is.
*
* The anon LRU stats live in [0], file LRU stats in [1]
*/
unsigned long recent_rotated[2];
unsigned long recent_scanned[2];
struct zone_reclaim_stat reclaim_stat;
unsigned long pages_scanned; /* since last reclaim */
unsigned long flags; /* zone flags, see below */