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List:       linux-api
Subject:    Re: [Patch v4 1/3] lib: Restrict cpumask_local_spread to houskeeping CPUs
From:       Thomas Gleixner <tglx () linutronix ! de>
Date:       2021-01-28 20:01:37
Message-ID: 87h7n0de5a.fsf () nanos ! tec ! linutronix ! de
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On Thu, Jan 28 2021 at 13:59, Marcelo Tosatti wrote:
>> The whole pile wants to be reverted. It's simply broken in several ways.
>
> I was asking for your comments on interaction with CPU hotplug :-)

Which I answered in an seperate mail :)

> So housekeeping_cpumask has multiple meanings. In this case:

...

> So as long as the meaning of the flags are respected, seems
> alright.

Yes. Stuff like the managed interrupts preference for housekeeping CPUs
when a affinity mask spawns housekeeping and isolated is perfectly
fine. It's well thought out and has no limitations.

> Nitesh, is there anything preventing this from being fixed
> in userspace ? (as Thomas suggested previously).

Everything with is not managed can be steered by user space.

Thanks,

        tglx
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