linux-kernel - Re: [RFC PATCH 0/5] kmemtrace RFC patch series

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Date:	Fri, 11 Jul 2008 11:38:41 -0400
From:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
To:	Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>
Cc:	penberg@...helsinki.fi, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [RFC PATCH 0/5] kmemtrace RFC patch series

Hi Eduard,

Did you have a look at the new tracepoints infrastructure ? I think it
could simplify your patchset a _lot_ !

Basically, it removes the format string from markers and allows to pass
complex structure pointers as arguments. It aims at simplifying the life
of in-kernel tracers which would want to use the facility. Turning a
marker implementation to tracepoints is really straightforward, for an
example see :

http://lkml.org/lkml/2008/7/9/569

For the tracepoints patchset :

http://lkml.org/lkml/2008/7/9/199

I think much of include/linux/kmemtrace.h, which is really just wrappers
around marker code, could then go away.

Regards,

Mathieu

* Eduard - Gabriel Munteanu (eduard.munteanu@...ux360.ro) wrote:
> Hi everybody,
> 
> I'd like to hear your opinion regarding kmemtrace and SL*B hooks.
> 
> This is just a RFC, it's not intended to be merged yet. The userspace
> app is not included.
> 
> BTW, there may be some whitespace errors, but disregard them for now,
> they will be fixed.
> 
> 	Cheers,
> 	Eduard
> 
> 
> Eduard - Gabriel Munteanu (5):
>   kmemtrace: Core implementation.
>   Add new GFP flag __GFP_NOTRACE.
>   kmemtrace: SLAB hooks.
>   kmemtrace: SLUB hooks.
>   kmemtrace: SLOB hooks.
> 
>  MAINTAINERS               |    6 ++
>  include/linux/gfp.h       |    1 +
>  include/linux/kmemtrace.h |  110 +++++++++++++++++++++++
>  include/linux/slab_def.h  |   16 +++-
>  include/linux/slub_def.h  |    9 ++-
>  init/main.c               |    2 +
>  lib/Kconfig.debug         |    4 +
>  mm/Makefile               |    2 +-
>  mm/kmemtrace.c            |  213 +++++++++++++++++++++++++++++++++++++++++++++
>  mm/slab.c                 |   35 ++++++--
>  mm/slob.c                 |   37 +++++++--
>  mm/slub.c                 |   49 +++++++++--
>  12 files changed, 460 insertions(+), 24 deletions(-)
>  create mode 100644 include/linux/kmemtrace.h
>  create mode 100644 mm/kmemtrace.c



-- 
Mathieu Desnoyers
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