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Date:   Mon, 17 Feb 2020 11:04:49 -0500
From:   Peter Xu <>
Cc:     Thomas Gleixner <>,
        Juri Lelli <>,
        Marcelo Tosatti <>,
        Peter Zijlstra <>
Subject: Re: [PATCH v2 0/3] smp: Allow smp_call_function_single_async() to
 insert locked csd

On Mon, Dec 16, 2019 at 04:31:22PM -0500, Peter Xu wrote:
> This v2 introduced two more patches to let mips/kernel/smp.c and
> kernel/sched/core.c to start using the new feature, then we can drop
> the customized implementations.
> One thing to mention is that cpuidle_coupled_poke_pending is another
> candidate that we can consider, however that cpumask is special in
> that it's not only used for singleton test of the per-vcpu csd when
> injecting new calls, but also in cpuidle_coupled_any_pokes_pending()
> or so to check whether there's any pending pokes.  In that sense it
> should be good to still keep the mask because it could be faster than
> looping over each per-cpu csd.
> Patch 1 is the same as v1, no change.  Patch 2-3 are new ones.
> Smoke tested on x86_64 only.
> Please review, thanks.


Peter Xu

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