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authorMike Snitzer <snitzer@redhat.com>2018-05-10 11:18:49 -0400
committerMike Snitzer <snitzer@redhat.com>2018-05-10 11:18:49 -0400
commit28700a36232ba61fb6ac59466821546cb25aec69 (patch)
tree44edd77f7ff77058cb725aef6c25810527a212f7
parent65972a6fa914b16cc15ffcffcb8bea8c64e78f49 (diff)
dm thin: update Documentation to clarify when "read_only" is valid
Due to user confusion, clarify that it doesn't make sense to try to create a thin-pool with "read_only" mode enabled. Signed-off-by: Mike Snitzer <snitzer@redhat.com>
-rw-r--r--Documentation/device-mapper/thin-provisioning.txt5
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/device-mapper/thin-provisioning.txt b/Documentation/device-mapper/thin-provisioning.txt
index 4bcd4b7f79f9..3d01948ea061 100644
--- a/Documentation/device-mapper/thin-provisioning.txt
+++ b/Documentation/device-mapper/thin-provisioning.txt
@@ -264,7 +264,10 @@ i) Constructor
data device, but just remove the mapping.
read_only: Don't allow any changes to be made to the pool
- metadata.
+ metadata. This mode is only available after the
+ thin-pool has been created and first used in full
+ read/write mode. It cannot be specified on initial
+ thin-pool creation.
error_if_no_space: Error IOs, instead of queueing, if no space.