Subject: Re: [Patch v4 1/3] lib: Restrict cpumask_local_spread to houskeeping CPUs

From: Thomas Gleixner <[email-masked]>
Date: Fri, 30 Apr 2021 20:21:33 +0200

Nitesh,

On Fri, Apr 30 2021 at 12:14, Nitesh Lal wrote:
> Based on this analysis and the fact that with your re-work the interrupts
> seems to be naturally spread across the CPUs, will it be safe to revert
> Jesse's patch
>
> e2e64a932 genirq: Set initial affinity in irq_set_affinity_hint()
>
> as it overwrites the previously set IRQ affinity mask for some of the
> devices?

That's a good question. My gut feeling says yes.

> IMHO if we think that this patch is still solving some issue other than
> what Jesse has mentioned then perhaps we should reproduce that and fix it
> directly from the request_irq code path.

Makes sense.

Thanks,

        tglx