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authorJoe Thornber <ejt@redhat.com>2013-03-02 02:45:51 +0400
committerAlasdair G Kergon <agk@redhat.com>2013-03-02 02:45:51 +0400
commitf283635281132af7bc7b90af3c105b8c0f73b9c7 (patch)
tree5ea66de48bc1f93a34b301986fa5455e53ac5a4c /drivers/md/Kconfig
parentc6b4fcbad044e6fffcc75bba160e720eb8d67d17 (diff)
downloadlinux-f283635281132af7bc7b90af3c105b8c0f73b9c7.tar.xz
dm cache: add mq policy
A cache policy that uses a multiqueue ordered by recent hit count to select which blocks should be promoted and demoted. This is meant to be a general purpose policy. It prioritises reads over writes. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/Kconfig')
-rw-r--r--drivers/md/Kconfig10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index 1a4fbcdb5ca2..1a96cbc7afda 100644
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -281,6 +281,16 @@ config DM_CACHE
algorithms used to select which blocks are promoted, demoted,
cleaned etc. It supports writeback and writethrough modes.
+config DM_CACHE_MQ
+ tristate "MQ Cache Policy (EXPERIMENTAL)"
+ depends on DM_CACHE
+ default y
+ ---help---
+ A cache policy that uses a multiqueue ordered by recent hit
+ count to select which blocks should be promoted and demoted.
+ This is meant to be a general purpose policy. It prioritises
+ reads over writes.
+
config DM_MIRROR
tristate "Mirror target"
depends on BLK_DEV_DM