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SubjectRe: [PATCH v12 6/8] sched/fair: Add sched group latency support
On Mon, Feb 27, 2023 at 02:44:22PM +0100, Vincent Guittot <vincent.guittot@linaro.org> wrote:
> Regarding the current use of latency nice to set a latency offset, the
> problem doesn't appear because latency offset applies between entities
> at the same level as you mentioned above

Splendid, it turned out that way (latency nice analogous to bandwidth
nice).

> Does my explanation above make sense to you ?

Yes, thank you.

Thus, I'd like to propose avoiding the use of "limit" in this context and
stress the horizontal scope. For example:

> + This interface file allows reading and setting latency using the
> + same values used by sched_setattr(2). The latency_nice of a group is
> + used to limit the impact of the latency_nice of a task outside the
> + group.

+ This interface file allows reading and setting latency using the
+ same values used by sched_setattr(2). The latency_nice of a group is
+ used to modify group members' latency with respect to sibling groups.

Regards,
Michal
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