[PATCH] zoned vm counters: zone_reclaim: remove /proc/sys/vm/zone_reclaim_interval

The zone_reclaim_interval was necessary because we were not able to determine
how many unmapped pages exist in a zone.  Therefore we had to scan in
intervals to figure out if any pages were unmapped.

With the zoned counters and NR_ANON_PAGES we now know the number of pagecache
pages and the number of mapped pages in a zone.  So we can simply skip the
reclaim if there is an insufficient number of unmapped pages.  We use
SWAP_CLUSTER_MAX as the boundary.

Drop all support for /proc/sys/vm/zone_reclaim_interval.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Christoph Lameter
2006-06-30 01:55:37 -07:00
committed by Linus Torvalds
parent f3dbd34460
commit 34aa1330f9
5 changed files with 10 additions and 50 deletions

View File

@ -178,12 +178,6 @@ struct zone {
/* Zone statistics */
atomic_long_t vm_stat[NR_VM_ZONE_STAT_ITEMS];
/*
* timestamp (in jiffies) of the last zone reclaim that did not
* result in freeing of pages. This is used to avoid repeated scans
* if all memory in the zone is in use.
*/
unsigned long last_unsuccessful_zone_reclaim;
/*
* prev_priority holds the scanning priority for this zone. It is