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authorMike Snitzer <snitzer@redhat.com>2013-08-16 10:54:20 -0400
committerMike Snitzer <snitzer@redhat.com>2013-08-23 09:02:13 -0400
commit66bb2644cac8b5cc1cc477959aa37dcfe6317a23 (patch)
tree614b8fc5e6a5a62d932b3b6627d85a493e0badf7 /Documentation/device-mapper
parent670368a8ddc5df56437444c33b8089afc547c30a (diff)
downloadblackbird-op-linux-66bb2644cac8b5cc1cc477959aa37dcfe6317a23.tar.gz
blackbird-op-linux-66bb2644cac8b5cc1cc477959aa37dcfe6317a23.zip
dm cache: document metadata device is exclussive to a cache
A cache's metadata device may not be shared by multiple cache devices. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com> Acked-by: Joe Thornber <ejt@redhat.com>
Diffstat (limited to 'Documentation/device-mapper')
-rw-r--r--Documentation/device-mapper/cache.txt3
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/device-mapper/cache.txt b/Documentation/device-mapper/cache.txt
index e8cdf7241b66..af99c458c841 100644
--- a/Documentation/device-mapper/cache.txt
+++ b/Documentation/device-mapper/cache.txt
@@ -50,7 +50,8 @@ other parameters detailed later):
which are dirty, and extra hints for use by the policy object.
This information could be put on the cache device, but having it
separate allows the volume manager to configure it differently,
- e.g. as a mirror for extra robustness.
+ e.g. as a mirror for extra robustness. This metadata device may only
+ be used by a single cache device.
Fixed block size
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