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authorJoe Thornber <ejt@redhat.com>2016-12-15 12:57:31 +0300
committerMike Snitzer <snitzer@redhat.com>2017-03-07 21:28:31 +0300
commitb29d4986d0da1a27cd35917cdb433672f5c95d7f (patch)
treea5d94b86cf1eb759bfef5761015135d747e80561 /drivers/md/Kconfig
parent742c8fdc31e820503f9267070311d894978d1349 (diff)
downloadlinux-b29d4986d0da1a27cd35917cdb433672f5c95d7f.tar.xz
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/Kconfig8
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