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authorMike Snitzer <snitzer@redhat.com>2014-05-20 13:38:33 -0400
committerMike Snitzer <snitzer@redhat.com>2014-05-20 14:30:36 -0400
commit80c578930ce77ba8bcfb226a184b482020bdda7b (patch)
treea9fbfe8a07238c317651a283c9bbf230d4002bb5 /Documentation/device-mapper/thin-provisioning.txt
parent4cdd2ad78098244c1bc9ec4374ea1c225fd1cd6f (diff)
dm thin: add 'no_space_timeout' dm-thin-pool module param
Commit 85ad643b ("dm thin: add timeout to stop out-of-data-space mode holding IO forever") introduced a fixed 60 second timeout. Users may want to either disable or modify this timeout. Allow the out-of-data-space timeout to be configured using the 'no_space_timeout' dm-thin-pool module param. Setting it to 0 will disable the timeout, resulting in IO being queued until more data space is added to the thin-pool. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@vger.kernel.org # 3.14+
Diffstat (limited to 'Documentation/device-mapper/thin-provisioning.txt')
-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 05a27e9442bd..2f5173500bd9 100644
--- a/Documentation/device-mapper/thin-provisioning.txt
+++ b/Documentation/device-mapper/thin-provisioning.txt
@@ -309,7 +309,10 @@ ii) Status
error_if_no_space|queue_if_no_space
If the pool runs out of data or metadata space, the pool will
either queue or error the IO destined to the data device. The
- default is to queue the IO until more space is added.
+ default is to queue the IO until more space is added or the
+ 'no_space_timeout' expires. The 'no_space_timeout' dm-thin-pool
+ module parameter can be used to change this timeout -- it
+ defaults to 60 seconds but may be disabled using a value of 0.
iii) Messages