linux-kernel - Re: [PATCH] slub: reduce overhead of slub

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Message-ID: <alpine.DEB.2.00.1106281431370.27518@router.home>
Date:	Tue, 28 Jun 2011 14:32:08 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Marcin Slusarz <marcin.slusarz@...il.com>
cc:	Pekka Enberg <penberg@...nel.org>, Matt Mackall <mpm@...enic.com>,
	LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org
Subject: Re: [PATCH] slub: reduce overhead of slub_debug

On Sun, 26 Jun 2011, Marcin Slusarz wrote:

> slub checks for poison one byte by one, which is highly inefficient
> and shows up frequently as a highest cpu-eater in perf top.

Ummm.. Performance improvements for debugging modes? If you need
performance then switch off debuggin.

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