linux-kernel - Re: [PATCH v4 0/8] support for bitmap (and hence CPU) list "N" abbreviation

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Message-ID: <YCQJToq1d63BU55S@smile.fi.intel.com>
Date:   Wed, 10 Feb 2021 18:26:54 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Paul Gortmaker <paul.gortmaker@...driver.com>
Cc:     linux-kernel@...r.kernel.org, Li Zefan <lizefan@...wei.com>,
        Ingo Molnar <mingo@...nel.org>,
        Yury Norov <yury.norov@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Josh Triplett <josh@...htriplett.org>,
        Peter Zijlstra <peterz@...radead.org>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Frederic Weisbecker <fweisbec@...il.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>
Subject: Re: [PATCH v4 0/8] support for bitmap (and hence CPU) list "N"
 abbreviation

On Tue, Feb 09, 2021 at 05:58:59PM -0500, Paul Gortmaker wrote:
> The basic objective here was to add support for "nohz_full=8-N" and/or
> "rcu_nocbs="4-N" -- essentially introduce "N" as a portable reference
> to the last core, evaluated at boot for anything using a CPU list.

I thought we kinda agreed that N is confusing and L is better.
N to me is equal to 32 on 32 core system as *number of cores / CPUs*. While L
sounds better as *last available CPU number*.

-- 
With Best Regards,
Andy Shevchenko