diff options
Diffstat (limited to 'drivers/md/dm-cache-policy-smq.c')
| -rw-r--r-- | drivers/md/dm-cache-policy-smq.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/md/dm-cache-policy-smq.c b/drivers/md/dm-cache-policy-smq.c index f3cec4e6333c..c33f4a6e1d7d 100644 --- a/drivers/md/dm-cache-policy-smq.c +++ b/drivers/md/dm-cache-policy-smq.c @@ -1359,6 +1359,11 @@ static void smq_clear_dirty(struct dm_cache_policy *p, dm_oblock_t oblock) spin_unlock_irqrestore(&mq->lock, flags); } +static unsigned random_level(dm_cblock_t cblock) +{ + return hash_32_generic(from_cblock(cblock), 9) & (NR_CACHE_LEVELS - 1); +} + static int smq_load_mapping(struct dm_cache_policy *p, dm_oblock_t oblock, dm_cblock_t cblock, uint32_t hint, bool hint_valid) @@ -1369,7 +1374,7 @@ static int smq_load_mapping(struct dm_cache_policy *p, e = alloc_particular_entry(&mq->cache_alloc, from_cblock(cblock)); e->oblock = oblock; e->dirty = false; /* this gets corrected in a minute */ - e->level = hint_valid ? min(hint, NR_CACHE_LEVELS - 1) : 1; + e->level = hint_valid ? min(hint, NR_CACHE_LEVELS - 1) : random_level(cblock); push(mq, e); return 0; |