linux-kernel - Re: [PATCH v3 3/9] x86/mm/tlb: Open-code on_each_cpu_cond_mask() for tlb_is_not

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Message-ID: <20190722182735.GC6698@worktop.programming.kicks-ass.net>
Date:   Mon, 22 Jul 2019 20:27:35 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Nadav Amit <namit@...are.com>
Cc:     Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Rik van Riel <riel@...riel.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [PATCH v3 3/9] x86/mm/tlb: Open-code on_each_cpu_cond_mask() for
 tlb_is_not_lazy()

On Thu, Jul 18, 2019 at 05:58:31PM -0700, Nadav Amit wrote:
> +static DEFINE_PER_CPU(cpumask_t, flush_tlb_mask);

I'm thinking it should be possible to allocate this before we switch to
SMP, no? cpumask_t really should not be used wherever possible.