linux-kernel - Re: [PATCH 05/25] Break up the allocator entry point into fast and slow paths

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Message-Id: <1240297984.771.24.camel@penberg-laptop>
Date:	Tue, 21 Apr 2009 10:13:04 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	Mel Gorman <mel@....ul.ie>,
	Linux Memory Management List <linux-mm@...ck.org>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Lin Ming <ming.m.lin@...el.com>,
	Zhang Yanmin <yanmin_zhang@...ux.intel.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 05/25] Break up the allocator entry point into fast and
 slow paths

Hi!

On Tue, 2009-04-21 at 15:35 +0900, KOSAKI Motohiro wrote:
> > The core of the page allocator is one giant function which allocates memory
> > on the stack and makes calculations that may not be needed for every
> > allocation. This patch breaks up the allocator path into fast and slow
> > paths for clarity. Note the slow paths are still inlined but the entry is
> > marked unlikely.  If they were not inlined, it actally increases text size
> > to generate the as there is only one call site.
> 
> hmm..
> 
> this patch have few behavior change.
> please separate big cleanup patch and behavior patch.
> 
> I hope to make this patch non functional change. I'm not sure about these
> are your intentional change or not. it cause harder reviewing...

Agreed, splitting this patch into smaller chunks would make it easier to review.

			Pekka

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