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| author | Linux Build Service Account <lnxbuild@localhost> | 2018-06-28 02:34:28 -0700 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2018-06-28 02:34:27 -0700 |
| commit | 14efecefa760800fa4d6974054b52e3e7ca91d3f (patch) | |
| tree | e1d877bcca0ed1ab28fc6f6f897fafb964953545 /Documentation | |
| parent | 66c519deb658ad6c8395d681bc6123a8098a7752 (diff) | |
| parent | f9cff13b5d3e04e897a495168da90933b503a6cc (diff) | |
Merge "Merge android-4.4.135 (c9d74f2) into msm-4.4"
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/device-mapper/thin-provisioning.txt | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/Documentation/device-mapper/thin-provisioning.txt b/Documentation/device-mapper/thin-provisioning.txt index 1699a55b7b70..ef639960b272 100644 --- a/Documentation/device-mapper/thin-provisioning.txt +++ b/Documentation/device-mapper/thin-provisioning.txt @@ -112,9 +112,11 @@ $low_water_mark is expressed in blocks of size $data_block_size. If free space on the data device drops below this level then a dm event will be triggered which a userspace daemon should catch allowing it to extend the pool device. Only one such event will be sent. -Resuming a device with a new table itself triggers an event so the -userspace daemon can use this to detect a situation where a new table -already exceeds the threshold. + +No special event is triggered if a just resumed device's free space is below +the low water mark. However, resuming a device always triggers an +event; a userspace daemon should verify that free space exceeds the low +water mark when handling this event. A low water mark for the metadata device is maintained in the kernel and will trigger a dm event if free space on the metadata device drops below |