linux-kernel - Re: [PATCH v5 8/9] x86-64: Emulate legacy vsyscalls

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Date:	Wed, 8 Jun 2011 08:55:26 +0300
From:	Pekka Enberg <penberg@...nel.org>
To:	pageexec@...email.hu
Cc:	Ingo Molnar <mingo@...e.hu>, Andrew Lutomirski <luto@....edu>,
	x86@...nel.org, Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, Jesper Juhl <jj@...osbits.net>,
	Borislav Petkov <bp@...en8.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Jan Beulich <JBeulich@...ell.com>,
	richard -rw- weinberger <richard.weinberger@...il.com>,
	Mikael Pettersson <mikpe@...uu.se>,
	Andi Kleen <andi@...stfloor.org>,
	Brian Gerst <brgerst@...il.com>,
	Louis Rilling <Louis.Rilling@...labs.com>,
	Valdis.Kletnieks@...edu
Subject: Re: [PATCH v5 8/9] x86-64: Emulate legacy vsyscalls

On Wed, Jun 8, 2011 at 2:24 AM,  <pageexec@...email.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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