linux-kernel - Re: [PATCH v2 5/7] perf: Introduce address range filtering

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Date:	Sat, 30 Apr 2016 07:59:46 +0300
From:	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
To:	Mathieu Poirier <mathieu.poirier@...aro.org>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
	Borislav Petkov <bp@...en8.de>, Ingo Molnar <mingo@...hat.com>,
	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
	vince@...ter.net, Stephane Eranian <eranian@...gle.com>,
	Arnaldo Carvalho de Melo <acme@...radead.org>
Subject: Re: [PATCH v2 5/7] perf: Introduce address range filtering

Mathieu Poirier <mathieu.poirier@...aro.org> writes:

> I see two things in this work:

[trimmed 700+ lines of context that had no purpose]

> 1) A framework to deal with filters described in user space.
> 2) An implementation for address filtering that will work for both
> Intel and ARM.
>
> This will work well for address filtering (for both PT and CS) but
> what happens when we want to introduce new filters?  This is
> inevitable and some filters will be architecture agnostic while others
> architecture specific.

Haven't we been through this [1] already?

[1] http://marc.info/?l=linux-kernel&m=145013911827358

Regards,
--
Alex