diff options
Diffstat (limited to 'drivers/md/dm-cache-policy-smq.c')
| -rw-r--r-- | drivers/md/dm-cache-policy-smq.c | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/drivers/md/dm-cache-policy-smq.c b/drivers/md/dm-cache-policy-smq.c index e0c40aec5e96..72479bd61e11 100644 --- a/drivers/md/dm-cache-policy-smq.c +++ b/drivers/md/dm-cache-policy-smq.c @@ -1120,28 +1120,30 @@ static bool clean_target_met(struct smq_policy *mq, bool idle) * Cache entries may not be populated. So we cannot rely on the * size of the clean queue. */ - unsigned nr_clean = from_cblock(mq->cache_size) - q_size(&mq->dirty); + unsigned nr_clean; - if (idle) + if (idle) { /* * We'd like to clean everything. */ return q_size(&mq->dirty) == 0u; - else - return (nr_clean + btracker_nr_writebacks_queued(mq->bg_work)) >= - percent_to_target(mq, CLEAN_TARGET); + } + + nr_clean = from_cblock(mq->cache_size) - q_size(&mq->dirty); + return (nr_clean + btracker_nr_writebacks_queued(mq->bg_work)) >= + percent_to_target(mq, CLEAN_TARGET); } static bool free_target_met(struct smq_policy *mq, bool idle) { - unsigned nr_free = from_cblock(mq->cache_size) - - mq->cache_alloc.nr_allocated; + unsigned nr_free; - if (idle) - return (nr_free + btracker_nr_demotions_queued(mq->bg_work)) >= - percent_to_target(mq, FREE_TARGET); - else + if (!idle) return true; + + nr_free = from_cblock(mq->cache_size) - mq->cache_alloc.nr_allocated; + return (nr_free + btracker_nr_demotions_queued(mq->bg_work)) >= + percent_to_target(mq, FREE_TARGET); } /*----------------------------------------------------------------*/ @@ -1214,7 +1216,11 @@ static void queue_promotion(struct smq_policy *mq, dm_oblock_t oblock, return; if (allocator_empty(&mq->cache_alloc)) { - if (!free_target_met(mq, false)) + /* + * We always claim to be 'idle' to ensure some demotions happen + * with continuous loads. + */ + if (!free_target_met(mq, true)) queue_demotion(mq); return; } |
