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authorJoe Thornber <ejt@redhat.com>2013-03-01 22:45:51 (GMT)
committerAlasdair G Kergon <agk@redhat.com>2013-03-01 22:45:51 (GMT)
commitc6b4fcbad044e6fffcc75bba160e720eb8d67d17 (patch)
tree1fb20e6ca157ebfbf2c97ae022fc6ba3e0550dd6 /drivers/md/persistent-data
parent7a87edfee75151abb69d47dba2277ff2de0f6071 (diff)
downloadlinux-c6b4fcbad044e6fffcc75bba160e720eb8d67d17.tar.xz
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: Joe Thornber <ejt@redhat.com> Signed-off-by: Heinz Mauelshagen <mauelshagen@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/persistent-data')
-rw-r--r--drivers/md/persistent-data/dm-block-manager.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/persistent-data/dm-block-manager.c b/drivers/md/persistent-data/dm-block-manager.c
index 28c3ed0..81b5138 100644
--- a/drivers/md/persistent-data/dm-block-manager.c
+++ b/drivers/md/persistent-data/dm-block-manager.c
@@ -613,6 +613,7 @@ int dm_bm_flush_and_unlock(struct dm_block_manager *bm,
return dm_bufio_write_dirty_buffers(bm->bufio);
}
+EXPORT_SYMBOL_GPL(dm_bm_flush_and_unlock);
void dm_bm_set_read_only(struct dm_block_manager *bm)
{