Re: [PATCH v2 3/9] sched: Remove checks against SD_LOAD_BALANCE

[Dietmar Eggemann]

On 11.03.20 19:15, Valentin Schneider wrote:
> Potential users of that flag could have been cpusets and isolcpus.
> 
> cpusets don't need it because they define exclusive (i.e. non-overlapping)
> domain spans, see cpuset.cpu_exclusive and cpuset.sched_load_balance.
> If such a cpuset contains a single CPU, it will have the NULL domain
> attached to it. If it contains several CPUs, none of their domains will
> extend beyond the span of the cpuset.

There are also non-exclusive cpusets but I assume the statement is the same.

CPUs which are only used in cpusets with cpuset.sched_load_balance=0 are
attached to the NULL sched-domain.

There seems to be no code which alters the SD_LOAD_BALANCE flag.

[...]