linux-kernel - Re: [PATCH] mm/slab: Do not hash pointers when debugging slab

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Message-ID: <alpine.DEB.2.20.1712070512120.7218@nuc-kabylake>
Date:   Thu, 7 Dec 2017 05:13:56 -0600 (CST)
From:   Christopher Lameter <cl@...ux.com>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
cc:     Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Tobin C . Harding" <me@...in.cc>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH] mm/slab: Do not hash pointers when debugging slab

On Thu, 7 Dec 2017, Geert Uytterhoeven wrote:

> If CONFIG_DEBUG_SLAB/CONFIG_DEBUG_SLAB_LEAK are enabled, the slab code
> prints extra debug information when e.g. corruption is detected.
> This includes pointers, which are not very useful when hashed.
>
> Fix this by using %px to print unhashed pointers instead.

Acked-by: Christoph Lameter <cl@...ux.com>

These SLAB config options are only used for testing so this is ok.