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Commit c9f299d9 authored by KOSAKI Motohiro's avatar KOSAKI Motohiro Committed by Linus Torvalds
Browse files

mm: add zone nr_pages helper function 



Add zone_nr_pages() helper function.

It is used by a later patch.  This patch doesn't have any functional
change.

Reviewed-by: default avatarKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: default avatarKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: default avatarRik 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 6e901571

mm/vmscan.c

+11 −4
Original line number Diff line number Diff line
@@ -136,6 +136,13 @@ static struct zone_reclaim_stat *get_reclaim_stat(struct zone *zone, 
	return &zone->reclaim_stat;

}



static unsigned long zone_nr_pages(struct zone *zone, struct scan_control *sc,

				   enum lru_list lru)

{

	return zone_page_state(zone, NR_LRU_BASE + lru);

}





/*

 * Add a shrinker callback to be called from the vm

 */
@@ -1365,10 +1372,10 @@ static void get_scan_ratio(struct zone *zone, struct scan_control *sc, 
		return;

	}



	anon  = zone_page_state(zone, NR_ACTIVE_ANON) +

		zone_page_state(zone, NR_INACTIVE_ANON);

	file  = zone_page_state(zone, NR_ACTIVE_FILE) +

		zone_page_state(zone, NR_INACTIVE_FILE);

	anon  = zone_nr_pages(zone, sc, LRU_ACTIVE_ANON) +

		zone_nr_pages(zone, sc, LRU_INACTIVE_ANON);

	file  = zone_nr_pages(zone, sc, LRU_ACTIVE_FILE) +

		zone_nr_pages(zone, sc, LRU_INACTIVE_FILE);

	free  = zone_page_state(zone, NR_FREE_PAGES);



	/* If we have very few page cache pages, force-scan anon pages. */