netdev - Re: [PATCH 3/9] sched: add sched_numa_find_nth

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Message-ID: <xhsmh4jrxsr9j.mognet@vschneid.remote.csb>
Date:   Tue, 07 Feb 2023 10:29:12 +0000
From:   Valentin Schneider <vschneid@...hat.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Yury Norov <yury.norov@...il.com>, linux-kernel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Barry Song <baohua@...nel.org>,
        Ben Segall <bsegall@...gle.com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Gal Pressman <gal@...dia.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Haniel Bristot de Oliveira <bristot@...hat.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Ingo Molnar <mingo@...hat.com>,
        Jacob Keller <jacob.e.keller@...el.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Leon Romanovsky <leonro@...dia.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Mel Gorman <mgorman@...e.de>,
        Peter Lafreniere <peter@...jl.ca>,
        Peter Zijlstra <peterz@...radead.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Saeed Mahameed <saeedm@...dia.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Tariq Toukan <tariqt@...dia.com>,
        Tariq Toukan <ttoukan.linux@...il.com>,
        Tony Luck <tony.luck@...el.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        linux-crypto@...r.kernel.org, netdev@...r.kernel.org,
        linux-rdma@...r.kernel.org
Subject: Re: [PATCH 3/9] sched: add sched_numa_find_nth_cpu()

On 06/02/23 21:09, Jakub Kicinski wrote:
> On Fri, 20 Jan 2023 20:24:30 -0800 Yury Norov wrote:
>> The function finds Nth set CPU in a given cpumask starting from a given
>> node.
>>
>> Leveraging the fact that each hop in sched_domains_numa_masks includes the
>> same or greater number of CPUs than the previous one, we can use binary
>> search on hops instead of linear walk, which makes the overall complexity
>> of O(log n) in terms of number of cpumask_weight() calls.
>
> Valentin, would you be willing to give us a SoB or Review tag for
> this one?  We'd like to take the whole series via networking, if
> that's okay.

Sure, feel free to add

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

to patches that don't already have it.