linux-kernel - Re: [PATCH 0/3] smp: Avoid memory allocation in on_each_cpu

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Message-ID: <20200117150054.GF14879@hirez.programming.kicks-ass.net>
Date:   Fri, 17 Jan 2020 16:00:54 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 0/3] smp: Avoid memory allocation in on_each_cpu_cond()

On Fri, Jan 17, 2020 at 10:01:34AM +0100, Sebastian Andrzej Siewior wrote:
> x86 is using on_each_cpu_cond_mask() in native_flush_tlb_others() in a
> preempt disabled section. The memory allocation in
> on_each_cpu_cond_mask() gives me a headache on RT.
> This is an attempt to get rid of the memory allocation and potentially
> accelerating the code path :)

Looks good to me,

Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>