dm: add cache target
Add a target that allows a fast device such as an SSD to be used as a cache for a slower device such as a disk. A plug-in architecture was chosen so that the decisions about which data to migrate and when are delegated to interchangeable tunable policy modules. The first general purpose module we have developed, called "mq" (multiqueue), follows in the next patch. Other modules are under development. Signed-off-by: NJoe Thornber <ejt@redhat.com> Signed-off-by: NHeinz Mauelshagen <mauelshagen@redhat.com> Signed-off-by: NMike Snitzer <snitzer@redhat.com> Signed-off-by: NAlasdair G Kergon <agk@redhat.com>
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drivers/md/dm-cache-block-types.h
0 → 100644
drivers/md/dm-cache-metadata.c
0 → 100644
drivers/md/dm-cache-metadata.h
0 → 100644
drivers/md/dm-cache-policy.c
0 → 100644
drivers/md/dm-cache-policy.h
0 → 100644
drivers/md/dm-cache-target.c
0 → 100644
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