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SubjectRe: [RFC][PATCH] avoid cpu hot remove of cpus which have special RT tasks.

> When cpu hot remove happens, tasks on the target cpu will be migrated even if
> no available cpus in tsk->cpus_allowed. (See: move_task_off_dead_cpu().)
> Usually, it looks ok (I think not good but may be ok.) But forced migration
> should be avoided if there is RT task which is designed to run only on
> specified cpu.

That would break software suspend, sorry.

64 bytes from icmp_seq=28 ttl=51 time=448769.1 ms

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