linux-kernel - Re: [PATCH 0/6] sched, wait: Collapse __wait

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Message-ID: <20130930161141.GF3081@twins.programming.kicks-ass.net>
Date:	Mon, 30 Sep 2013 18:11:41 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Ingo Molnar <mingo@...nel.org>, Oleg Nesterov <oleg@...hat.com>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/6] sched, wait: Collapse __wait_event macros -v4

On Mon, Sep 30, 2013 at 08:50:04AM -0700, Linus Torvalds wrote:
> On Mon, Sep 30, 2013 at 8:22 AM, Peter Zijlstra <peterz@...radead.org> wrote:
> >
> > Compile and boot tested on x86_64.
> 
> Btw, I assume the odd binary size reduction is gone now, and code
> generation is generally identical?

Over patch 4; yes. Patches 1-3 generate different kernels, esp patch 2
has a large drop in size, 5 too is invariant. Patch 6 however increases
code size again, but then it actually changes the generated code so
that's somewhat expected.

But with patches 1-3 its all clear what changes and why; and having the
big scary conversion patch 4 invariant is good.
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