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References: <cover.1307292171.git.luto@mit.edu>
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Date: Wed, 8 Jun 2011 08:55:26 +0300
Message-ID: <BANLkTikNuPg4nfXMqpffpt+5zZwLM_nSzw@mail.gmail.com>
Subject: Re: [PATCH v5 8/9] x86-64: Emulate legacy vsyscalls
From: Pekka Enberg <penberg@kernel.org>
To: pageexec@freemail.hu
Cc: Ingo Molnar <mingo@elte.hu>, Andrew Lutomirski <luto@mit.edu>,
        x86@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
        linux-kernel@vger.kernel.org, Jesper Juhl <jj@chaosbits.net>,
        Borislav Petkov <bp@alien8.de>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Arjan van de Ven <arjan@infradead.org>,
        Jan Beulich <JBeulich@novell.com>,
        richard -rw- weinberger <richard.weinberger@gmail.com>,
        Mikael Pettersson <mikpe@it.uu.se>, Andi Kleen <andi@firstfloor.org>,
        Brian Gerst <brgerst@gmail.com>,
        Louis Rilling <Louis.Rilling@kerlabs.com>, Valdis.Kletnieks@vt.edu
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On Wed, Jun 8, 2011 at 2:24 AM,  <pageexec@freemail.hu> wrote:
> to give you an idea:
> - if a code path executes in 1M or 1K cycles once every hour, then
> ?it's not a fast path, it doesn't matter to anyone whether it runs
> ?1 or 10 cycles faster or not,

I'm pretty sure people who try to optimize kernel boot times, for
example, don't agree with you.

                                        Pekka
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