linux-kernel - Re: [RFC][PATCH 0/5] Signal scalability series

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Message-ID: <CA+55aFyscb=PcUDrEUhFbH89+W-KYEKrqKHeNN3dqmZD1GF_Hw@mail.gmail.com>
Date:	Mon, 3 Oct 2011 08:28:48 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Matt Fleming <matt@...sole-pimps.org>
Cc:	Andi Kleen <andi@...stfloor.org>, Oleg Nesterov <oleg@...hat.com>,
	Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org,
	Tony Luck <tony.luck@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	David Mosberger-Tang <davidm@...uge.net>
Subject: Re: [RFC][PATCH 0/5] Signal scalability series

On Sat, Oct 1, 2011 at 2:35 AM, Matt Fleming <matt@...sole-pimps.org> wrote:
>
> You and me both. Unfortunately, the ia64 guys had a different opinion,
> http://www.spinics.net/lists/linux-ia64/msg08363.html

Well, considering that it apparently slows down the single-threaded
case by 50% on an architecture that actually *matters*, I think the
whole discussion is somewhat academic, don't you?

"Scalability" is pretty much never a valid excuse for "slows down the
common case".

                       Linus
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