linux-kernel - Re: The killing of ideal

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Message-ID: <20210309120519.7c6bbb97@gandalf.local.home>
Date:   Tue, 9 Mar 2021 12:05:19 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: The killing of ideal_nops[]

On Tue, 9 Mar 2021 17:58:17 +0100
Peter Zijlstra <peterz@...radead.org> wrote:

> Hi,
> 
> AFAICT everything made in the past 10 years ends up using p6_nops. Is it
> time to kill off ideal_nops[] and simplify life?
> 

Well, the one bug that was reported recently was due to a box that uses a
different "ideal_nops" than p6_nops. Perhaps we should ask him if there's
any noticeable difference between using p6_nops for every function than the
ideal_nops that as found for that box.

-- Steve