linux-kernel - Re: [PATCH RFC cpumask 4/5] cpumask: Add "last" alias for cpu list specifications

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Message-ID: <X/ch3gaCCRMT/Cxw@hirez.programming.kicks-ass.net>
Date:   Thu, 7 Jan 2021 15:59:42 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     Yury Norov <yury.norov@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        kernel-team@...com, Paul Gortmaker <paul.gortmaker@...driver.com>
Subject: Re: [PATCH RFC cpumask 4/5] cpumask: Add "last" alias for cpu list
 specifications

On Thu, Jan 07, 2021 at 06:47:57AM -0800, Paul E. McKenney wrote:
> > I don't really see the use of the ranges thing, CPU enumeration just
> > isn't sane like that. Also, I should really add that randomization pass
> > to the CPU enumeration :-)
> 
> Please don't!!!

Why not, the BIOS more or less already does that on a per machine basis
anyway. Doing it per boot just makes things more reliably screwy ;-)