Re: [PATCH v3] sched: async unthrottling for cfs bandwidth

[Peter Zijlstra]

On Mon, Nov 21, 2022 at 11:37:14AM -0800, Josh Don wrote:
> Yep, this tradeoff feels "best", but there are some edge cases where
> this could potentially disrupt fairness. For example, if we have
> non-trivial W, a lot of cpus to iterate through for dispatching remote
> unthrottle, and quota is small. Doesn't help that the timer is pinned
> so that this will continually hit the same cpu.

We could -- if we wanted to -- manually rotate the timer around the
relevant CPUs. Doing that sanely would require a bit of hrtimer surgery
though I'm afraid.