linux-kernel - Re: [PATCH 1/2] sched/topology: introduce node_has

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Message-ID: <xhsmhbkkum04z.mognet@vschneid.remote.csb>
Date:   Wed, 15 Mar 2023 16:48:12 +0000
From:   Valentin Schneider <vschneid@...hat.com>
To:     Yury Norov <yury.norov@...il.com>, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Cc:     Yury Norov <yury.norov@...il.com>, Arnd Bergmann <arnd@...db.de>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Jeremy Kerr <jk@...abs.org>, Jakub Kicinski <kuba@...nel.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Barry Song <baohua@...nel.org>
Subject: Re: [PATCH 1/2] sched/topology: introduce node_has_cpus() macro

On 21/02/23 18:50, Yury Norov wrote:
> Currently, to check if NUMA node has CPUs, one has to use the
> nr_cpus_node() macro, which ends up with cpumask_weight. We can do it
> better with cpumask_empty(), because the latter can potentially return
> earlier - as soon as 1st set bit found.
>
> This patch adds a node_has_cpus() macro to implement that.
>
> Signed-off-by: Yury Norov <yury.norov@...il.com>

Reviewed-by: Valentin Schneider <vschneid@...hat.com>