diff options
| author | Joe Thornber <ejt@redhat.com> | 2016-12-15 04:57:31 -0500 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2017-03-07 13:28:31 -0500 |
| commit | b29d4986d0da1a27cd35917cdb433672f5c95d7f (patch) | |
| tree | a5d94b86cf1eb759bfef5761015135d747e80561 /drivers/md/Kconfig | |
| parent | 742c8fdc31e820503f9267070311d894978d1349 (diff) | |
dm cache: significant rework to leverage dm-bio-prison-v2
The cache policy interfaces have been updated to work well with the new
bio-prison v2 interface's ability to queue work immediately (promotion,
demotion, etc) -- overriding benefit being reduced latency on processing
IO through the cache. Previously such work would be left for the DM
cache core to queue on various lists and then process in batches later
-- this caused a serious delay in latency for IO driven by the cache.
The background tracker code was factored out so that all cache policies
can make use of it.
Also, the "cleaner" policy has been removed and is now a variant of the
smq policy that simply disallows migrations.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/Kconfig')
| -rw-r--r-- | drivers/md/Kconfig | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig index b7767da50c26..982cd0626bc7 100644 --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -325,14 +325,6 @@ config DM_CACHE_SMQ of less memory utilization, improved performance and increased adaptability in the face of changing workloads. -config DM_CACHE_CLEANER - tristate "Cleaner Cache Policy (EXPERIMENTAL)" - depends on DM_CACHE - default y - ---help--- - A simple cache policy that writes back all data to the - origin. Used when decommissioning a dm-cache. - config DM_ERA tristate "Era target (EXPERIMENTAL)" depends on BLK_DEV_DM |