Date: Tue, 28 Jun 2011 14:32:08 -0500 (CDT)
From: Christoph Lameter <cl@linux.com>
To: Marcin Slusarz <marcin.slusarz@gmail.com>
cc: Pekka Enberg <penberg@kernel.org>, Matt Mackall <mpm@selenic.com>,
        LKML <linux-kernel@vger.kernel.org>, linux-mm@kvack.org
Subject: Re: [PATCH] slub: reduce overhead of slub_debug
In-Reply-To: <20110626193918.GA3339@joi.lan>
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References: <20110626193918.GA3339@joi.lan>
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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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