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| author | Tejun Heo <tj@kernel.org> | 2019-05-13 12:37:17 -0700 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2019-05-31 11:48:40 -0700 |
| commit | a5e112e6424adb77d953eac20e6936b952fd6b32 (patch) | |
| tree | f338dc9c274907e5d2321f9e7e4a8608fdb202ea /Documentation/admin-guide | |
| parent | c03cd7738a83b13739f00546166969342c8ff014 (diff) | |
| download | linux-a5e112e6424adb77d953eac20e6936b952fd6b32.tar.gz linux-a5e112e6424adb77d953eac20e6936b952fd6b32.tar.bz2 linux-a5e112e6424adb77d953eac20e6936b952fd6b32.zip | |
cgroup: add cgroup_parse_float()
cgroup already uses floating point for percent[ile] numbers and there
are several controllers which want to take them as input. Add a
generic parse helper to handle inputs.
Update the interface convention documentation about the use of
percentage numbers. While at it, also clarify the default time unit.
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'Documentation/admin-guide')
| -rw-r--r-- | Documentation/admin-guide/cgroup-v2.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst index 88e746074252..73b0c0d8df31 100644 --- a/Documentation/admin-guide/cgroup-v2.rst +++ b/Documentation/admin-guide/cgroup-v2.rst @@ -696,6 +696,12 @@ Conventions informational files on the root cgroup which end up showing global information available elsewhere shouldn't exist. +- The default time unit is microseconds. If a different unit is ever + used, an explicit unit suffix must be present. + +- A parts-per quantity should use a percentage decimal with at least + two digit fractional part - e.g. 13.40. + - If a controller implements weight based resource distribution, its interface file should be named "weight" and have the range [1, 10000] with 100 as the default. The values are chosen to allow |