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authorMartin Hicks <mort@sgi.com>2005-06-21 17:14:43 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-21 18:46:14 -0700
commit1e7e5a9048b30c57ba1ddaa6cdf59b21b65cde99 (patch)
tree26eb9c483718ca1a0fad23597c0dfd3a69e9f080 /include
parent0c35bbadc59f5ed105c34471143eceb4c0dd9c95 (diff)
downloadlinux-1e7e5a9048b30c57ba1ddaa6cdf59b21b65cde99.tar.bz2
[PATCH] VM: rate limit early reclaim
When early zone reclaim is turned on the LRU is scanned more frequently when a zone is low on memory. This limits when the zone reclaim can be called by skipping the scan if another thread (either via kswapd or sync reclaim) is already reclaiming from the zone. Signed-off-by: Martin Hicks <mort@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mmzone.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index dfc2452ccb10..18fed8b67943 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -149,6 +149,8 @@ struct zone {
* as it fails a watermark_ok() in __alloc_pages?
*/
int reclaim_pages;
+ /* A count of how many reclaimers are scanning this zone */
+ atomic_t reclaim_in_progress;
/*
* prev_priority holds the scanning priority for this zone. It is