linux-kernel - Re: [PATCH V2 1/4] perf: Add hardware breakpoint address mask

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Message-ID: <20130425170635.GA1324@redhat.com>
Date:	Thu, 25 Apr 2013 19:06:35 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Jacob Shin <jacob.shin@....com>
Cc:	Will Deacon <will.deacon@....com>, Ingo Molnar <mingo@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"x86@...nel.org" <x86@...nel.org>,
	Stephane Eranian <eranian@...gle.com>,
	Jiri Olsa <jolsa@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V2 1/4] perf: Add hardware breakpoint address mask

On 04/24, Jacob Shin wrote:
>
> And only x86
> hw_breakpoint will know what .config = 0xf means for x86 and do the right
> thing. For ARM, 0xf will mean something different.
>
> The downside is that in userland perf tool we need differing documentation
> on what the mask syntax means for each architecture.

Personally I think this is acceptable.

But I am new to this code, so...

Oleg.

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