linux-kernel - Re: [GIT PULL] scheduler changes for v3.10

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Message-ID: <CA+55aFwcX3oKYCFbq4XcX7Y2Yk6BWWKY4TRNOyfeZ9rYrQMRNQ@mail.gmail.com>
Date:	Tue, 30 Apr 2013 07:49:43 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [GIT PULL] scheduler changes for v3.10

On Mon, Apr 29, 2013 at 11:58 PM, Ingo Molnar <mingo@...nel.org> wrote:
>
> Please pull the latest sched-core-for-linus git tree from:
>
> The main changes in this development cycle were:
>
>   - full dynticks preparatory work by Frederic Weisbecker

Why does this have the crappy cputime scaling overflow code, when we
had a long thread about how to do it right *without* any 64-bit
divides, including a quality-tested patch?

This still has the garbage "div64_u64_rem()" crap which actually SLOWS
DOWN 32-bit code even when not used (becuse it makes "div64_u64()"
calculate it even when unnecessary.

WTF happened here? I and others spent efforts so that we wouldn't need
this kind of crap.

               Linus
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