diff options
| author | Joe Thornber <ejt@redhat.com> | 2015-05-27 15:39:45 +0100 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2015-06-11 17:13:00 -0400 |
| commit | 88bf5184fa5861e766e39fd34fc6d21557ac7be8 (patch) | |
| tree | 5cbb1ffbcc0b8e7f648f2b65e93b834cb1a02b8b /drivers | |
| parent | 66a636356647a9be8885c2ce2948de126577698a (diff) | |
dm cache: wake the worker thread every time we free a migration object
When the cache is idle, writeback work was only being issued every
second. With this change outstanding writebacks are streamed
constantly. This offers a writeback performance improvement.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/dm-cache-target.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c index 7829d947ef01..6d36ed3c46a0 100644 --- a/drivers/md/dm-cache-target.c +++ b/drivers/md/dm-cache-target.c @@ -418,10 +418,13 @@ static struct dm_cache_migration *alloc_migration(struct cache *cache) static void free_migration(struct dm_cache_migration *mg) { - if (atomic_dec_and_test(&mg->cache->nr_allocated_migrations)) - wake_up(&mg->cache->migration_wait); + struct cache *cache = mg->cache; + + if (atomic_dec_and_test(&cache->nr_allocated_migrations)) + wake_up(&cache->migration_wait); - mempool_free(mg, mg->cache->migration_pool); + mempool_free(mg, cache->migration_pool); + wake_worker(cache); } static int prealloc_data_structs(struct cache *cache, struct prealloc *p) |