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authorGreg Thelen <gthelen@google.com>2018-06-08 04:37:59 +0300
committerJan Kara <jack@suse.cz>2018-06-20 12:04:26 +0300
commit9560ba306df3e46b4b1037d101e2e4ca68610f55 (patch)
treee480b217731cda6346d560cea44af7cd301a045a /fs/quota
parent81e97f01371f4e1701feeafe484665112cd9ddc2 (diff)
downloadlinux-9560ba306df3e46b4b1037d101e2e4ca68610f55.tar.xz
quota: reclaim least recently used dquots
The dquots in the free_dquots list are not reclaimed in LRU way. put_dquot_last() puts entries to the tail and dqcache_shrink_scan() frees from the tail. Free unreferenced dquots in LRU order because it seems more reasonable than freeing most recently used. Signed-off-by: Greg Thelen <gthelen@google.com> Signed-off-by: Shakeel Butt <shakeelb@google.com> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/quota')
-rw-r--r--fs/quota/dquot.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index d88231e3b2be..241b00f835b9 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -716,7 +716,7 @@ dqcache_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
unsigned long freed = 0;
spin_lock(&dq_list_lock);
- head = free_dquots.prev;
+ head = free_dquots.next;
while (head != &free_dquots && sc->nr_to_scan) {
dquot = list_entry(head, struct dquot, dq_free);
remove_dquot_hash(dquot);
@@ -725,7 +725,7 @@ dqcache_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
do_destroy_dquot(dquot);
sc->nr_to_scan--;
freed++;
- head = free_dquots.prev;
+ head = free_dquots.next;
}
spin_unlock(&dq_list_lock);
return freed;