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>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/md/Makefile b/drivers/md/Makefile
index 24b52560f4d2..adc8710c2408 100644
--- a/drivers/md/Makefile
+++ b/drivers/md/Makefile
@@ -12,6 +12,7 @@ dm-log-userspace-y \
                 += dm-log-userspace-base.o dm-log-userspace-transfer.o
 dm-thin-pool-y  += dm-thin.o dm-thin-metadata.o
 dm-cache-y      += dm-cache-target.o dm-cache-metadata.o dm-cache-policy.o
+dm-cache-mq-y   += dm-cache-policy-mq.o
 md-mod-y        += md.o bitmap.o
 raid456-y       += raid5.o
 
@@ -46,6 +47,7 @@ obj-$(CONFIG_DM_RAID)	+= dm-raid.o
 obj-$(CONFIG_DM_THIN_PROVISIONING)      += dm-thin-pool.o
 obj-$(CONFIG_DM_VERITY)         += dm-verity.o
 obj-$(CONFIG_DM_CACHE)          += dm-cache.o
+obj-$(CONFIG_DM_CACHE_MQ)       += dm-cache-mq.o
 
 ifeq ($(CONFIG_DM_UEVENT),y)
 dm-mod-objs                     += dm-uevent.o