dm cache policy smq: change max background work from 10240 to 4096 blocks

10240 blocks was too much, lowering this reduces the latency of copying
and consumes less memory.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

diff --git a/drivers/md/dm-cache-policy-smq.c b/drivers/md/dm-cache-policy-smq.c
index 99fae81..58be846 100644 (file)
--- a/drivers/md/dm-cache-policy-smq.c
+++ b/drivers/md/dm-cache-policy-smq.c
@@ -1789,7 +1789,7 @@ static struct dm_cache_policy *__smq_create(dm_cblock_t cache_size,
        mq->next_hotspot_period = jiffies;
        mq->next_cache_period = jiffies;
 
-       mq->bg_work = btracker_create(10240); /* FIXME: hard coded value */
+       mq->bg_work = btracker_create(4096); /* FIXME: hard coded value */
        if (!mq->bg_work)
                goto bad_btracker;