linux-kernel - Re: [PATCH] slab: fix caller tracking on !CONFIG_DEBUG_SLAB && CONFIG

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Message-ID: <alpine.DEB.2.00.1004090947030.10992@chino.kir.corp.google.com>
Date:	Fri, 9 Apr 2010 09:49:05 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Xiaotian Feng <dfeng@...hat.com>
cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Christoph Lameter <cl@...ux-foundation.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Matt Mackall <mpm@...enic.com>,
	Vegard Nossum <vegard.nossum@...il.com>,
	Dmitry Monakhov <dmonakhov@...nvz.org>,
	Catalin Marinas <catalin.marinas@....com>
Subject: Re: [PATCH] slab: fix caller tracking on !CONFIG_DEBUG_SLAB &&
 CONFIG_TRACING

On Fri, 9 Apr 2010, Xiaotian Feng wrote:

> > This doesn't work if the underlying slab allocator doesn't define
> > __kmalloc_node_track_caller() regardless of whether CONFIG_TRACING is
> > enabled or not.  SLOB, for example, never defines it, and that's why the
> > conditional exists in the way it currently does.
> > 
> 
> Sorry, I didn't realized this, can we use (defined(CONFIG_TRACING) &&
> defined(CONFIG_SLAB)) ?
> 

The valid configurations are

	(CONFIG_SLAB && (CONFIG_DEBUG_SLAB || CONFIG_TRACING)) || CONFIG_SLUB
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