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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Mon, 18 Feb 2019 09:49:10 -0800
Message-ID: <CAHk-=wh32Zgp+bN7G1KH7SuCiY1YSJ41Y-_eWpfWubGjqq2_dw@mail.gmail.com>
Subject: Re: [RFC][PATCH 00/16] sched: Core scheduling
To:     Peter Zijlstra <peterz@infradead.org>
Cc:     Ingo Molnar <mingo@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Paul Turner <pjt@google.com>,
        Tim Chen <tim.c.chen@linux.intel.com>,
        Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
        subhra.mazumdar@oracle.com,
        =?UTF-8?B?RnLDqWTDqXJpYyBXZWlzYmVja2Vy?= <fweisbec@gmail.com>,
        Kees Cook <keescook@chromium.org>, kerrnel@google.com
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On Mon, Feb 18, 2019 at 9:40 AM Peter Zijlstra <peterz@infradead.org> wrote:
>
> However; whichever way around you turn this cookie; it is expensive and nasty.

Do you (or anybody else) have numbers for real loads?

Because performance is all that matters. If performance is bad, then
it's pointless, since just turning off SMT is the answer.

                  Linus