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Docs/admin-guide/cgroup-v2: fix delay_nsec unit in io.latency doc

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The io.latency doc says the io.stat delay field counts microseconds.  The
field is delay_nsec and is reported in nanoseconds.  Refer to it by its
real name and correct the unit.

Signed-off-by: Tao Cui <cuitao@kylinos.cn>
Acked-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tao Cui
2026-07-17 14:02:25 +08:00
committed by Tejun Heo
parent 9133e0e2f7
commit 5da800b016
1 changed files with 3 additions and 3 deletions
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6
Documentation/admin-guide/cgroup-v2.rst
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@@ -2299,9 +2299,9 @@ This throttling takes 2 forms:
throttled without possibly adversely affecting higher priority groups. This
includes swapping and metadata IO. These types of IO are allowed to occur
normally, however they are "charged" to the originating group. If the
originating group is being throttled you will see the use_delay and delay
fields in io.stat increase. The delay value is how many microseconds that are
being added to any process that runs in this group. Because this number can
originating group is being throttled you will see the use_delay and delay_nsec
fields in io.stat increase. The delay_nsec value is how many nanoseconds that
are being added to any process that runs in this group. Because this number can
grow quite large if there is a lot of swapping or metadata IO occurring we
limit the individual delay events to 1 second at a time.