A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-28 02:32:09 -04:00
Code Issues Projects Releases Packages Wiki Activity

dm cache policy mq: simplify ability to promote sequential IO to the cache

Browse source 
Before, if the user wanted sequential IO to be promoted to the cache
they'd have to set sequential_threshold to some nebulous large value.

Now, the user may easily disable sequential IO detection (and sequential
IO's implicit bypass of the cache) by setting sequential_threshold to 0.

Signed-off-by: Mike Snitzer <[email protected]>
This commit is contained in:
Mike Snitzer 2014-10-30 10:02:01 -04:00
commit f1afb36a61
2 changed files with 15 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

7
drivers/md/dm-cache-policy-mq.c
View file

@ -865,7 +865,8 @@ static int map(struct mq_policy *mq, dm_oblock_t oblock,
if (e && in_cache(mq, e))
r = cache_entry_found(mq, e, result);
else if (iot_pattern(&mq->tracker) == PATTERN_SEQUENTIAL)
else if (mq->tracker.thresholds[PATTERN_SEQUENTIAL] &&
iot_pattern(&mq->tracker) == PATTERN_SEQUENTIAL)
result->op = POLICY_MISS;
else if (e)
@ -1290,7 +1291,7 @@ bad_pre_cache_init:
static struct dm_cache_policy_type mq_policy_type = {
.name = "mq",
.version = {1, 2, 0},
.version = {1, 3, 0},
.hint_size = 4,
.owner = THIS_MODULE,
.create = mq_create
@ -1298,7 +1299,7 @@ static struct dm_cache_policy_type mq_policy_type = {
static struct dm_cache_policy_type default_policy_type = {
.name = "default",
.version = {1, 2, 0},
.version = {1, 3, 0},
.hint_size = 4,
.owner = THIS_MODULE,
.create = mq_create,