linux-kernel - Re: [patch 02/10] SLUB: Noinline some functions to avoid them being folded into alloc/free

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Message-ID: <20071029232515.GR17536@waste.org>
Date:	Mon, 29 Oct 2007 18:25:15 -0500
From:	Matt Mackall <mpm@...enic.com>
To:	Christoph Lameter <clameter@....com>
Cc:	Matthew Wilcox <matthew@....cx>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Pekka Enberg <penberg@...helsinki.fi>
Subject: Re: [patch 02/10] SLUB: Noinline some functions to avoid them being folded into alloc/free

On Sat, Oct 27, 2007 at 08:31:58PM -0700, Christoph Lameter wrote:
> Some function tend to get folded into __slab_free and __slab_alloc
> although they are rarely called. They cause register pressure that
> leads to bad code generation.

Nice - an example of uninlining to directly improve performance!

-- 
Mathematics is the supreme nostalgia of our time.
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