linux-kernel - Re: [2/2] vmallocinfo: Add caller information

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Message-ID: <Pine.LNX.4.64.0804291001420.10847@schroedinger.engr.sgi.com>
Date:	Tue, 29 Apr 2008 10:08:29 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Ingo Molnar <mingo@...e.hu>
cc:	akpm@...ux-foundation.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: [2/2] vmallocinfo: Add caller information

On Tue, 29 Apr 2008, Ingo Molnar wrote:

> i pointed out how it should be done _much cleaner_ (and much smaller - 
> only a single patch needed) via stack-trace, without changing a dozen 
> architectures, and even gave a patch to make it all easier for you:
> 
>     http://lkml.org/lkml/2008/3/19/568
>     http://lkml.org/lkml/2008/3/21/88
> 
> in fact, a stacktrace printout is much more informative as well to 
> users, than a punny __builtin_return_address(0)!

Sorry lost track of this issue. Adding stracktrace support is not a 
trivial thing and will change the basic handling of vmallocinfo.

Not sure if stacktrace support can be enabled without a penalty on various 
platforms. Doesnt this require stackframes to be formatted in a certain 
way?

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