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

On Fri, Feb 05 2021 at 23:23, Thomas Gleixner wrote:

On Thu, Feb 04 2021 at 14:17, Nitesh Narayan Lal wrote:

quoted

On 2/4/21 2:06 PM, Marcelo Tosatti wrote:

quoted

quoted

quoted

How about adding a new flag for isolcpus instead?

Do you mean a flag based on which we can switch the affinity mask to
housekeeping for all the devices at the time of IRQ distribution?

Yes a new flag for isolcpus. HK_FLAG_IRQ_SPREAD or some better name.

Does sounds like a nice idea to explore, lets see what Thomas thinks about it.

<.SNIP.>

So I'm going to revert this commit because it _IS_ broken _AND_ useless
and does not solve anything it claims to solve.

And no. HK_FLAG_IRQ_SPREAD is not going to solve anything either.

Thanks,

        tglx