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authorHannes Reinecke <hare@suse.de>2020-05-11 11:24:17 +0300
committerMike Snitzer <snitzer@redhat.com>2020-05-15 17:29:36 +0300
commit90b39d58f39e1f3f3147caee6fb2a71528db74a2 (patch)
tree978ac4ee5a6358d1a6b892a8106b3de6f88873b8 /Documentation/admin-guide/device-mapper/dm-zoned.rst
parentbc3d5717d242a37d2e9ea85d7e7b2e3569324d24 (diff)
downloadlinux-90b39d58f39e1f3f3147caee6fb2a71528db74a2.tar.xz
dm zoned: add 'message' callback
Add callback for 'dmsetup message' to allow the reclaim process to be triggered manually. Eg. dmsetup message /dev/dm-X 0 message will start the reclaim process even if the default threshold of 50 percent of free random zones is not reached. Signed-off-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Bob Liu <bob.liu@oracle.com> Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'Documentation/admin-guide/device-mapper/dm-zoned.rst')
-rw-r--r--Documentation/admin-guide/device-mapper/dm-zoned.rst12
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diff --git a/Documentation/admin-guide/device-mapper/dm-zoned.rst b/Documentation/admin-guide/device-mapper/dm-zoned.rst
index 4165fbf1aeb6..7547ce635161 100644
--- a/Documentation/admin-guide/device-mapper/dm-zoned.rst
+++ b/Documentation/admin-guide/device-mapper/dm-zoned.rst
@@ -160,3 +160,15 @@ where <nr_zones> is the total number of zones, <nr_unmap_rnd> is the number
of unmapped (ie free) random zones, <nr_rnd> the total number of zones,
<nr_unmap_seq> the number of unmapped sequential zones, and <nr_seq> the
total number of sequential zones.
+
+Normally the reclaim process will be started once there are less than 50
+percent free random zones. In order to start the reclaim process manually
+even before reaching this threshold the 'dmsetup message' function can be
+used:
+
+Ex::
+
+ dmsetup message /dev/dm-X 0 reclaim
+
+will start the reclaim process and random zones will be moved to sequential
+zones.