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Commit 9560ba30 authored by Greg Thelen's avatar Greg Thelen Committed by Jan Kara
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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: default avatarGreg Thelen <gthelen@google.com>
Signed-off-by: default avatarShakeel Butt <shakeelb@google.com>
Signed-off-by: default avatarJan Kara <jack@suse.cz>
parent 81e97f01

fs/quota/dquot.c

+2 −2
Original line number Diff line number Diff line
@@ -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;