linux-kernel - Re: [PATCH 08/10] perf_event: Optimize the constraint searching bits

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Message-ID: <bd4cb8901001220828x40018249u5ffc8dfa8c2b7448@mail.gmail.com>
Date:	Fri, 22 Jan 2010 17:28:36 +0100
From:	Stephane Eranian <eranian@...gle.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	fweisbec@...il.com, paulus@...ba.org, mingo@...e.hu,
	davem@...emloft.net, robert.richter@....com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/10] perf_event: Optimize the constraint searching bits

On Fri, Jan 22, 2010 at 5:22 PM, Peter Zijlstra <peterz@...radead.org> wrote:
> On Fri, 2010-01-22 at 17:08 +0100, Stephane Eranian wrote:
>> On Fri, Jan 22, 2010 at 4:50 PM, Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
>> > Instead of copying bitmasks around, pass pointers to the constraint structure.
>> >
>> The reason I changed that is because of the AMD situation where constraints
>> are dynamically generated. So we need to get some storage from somwhere.
>> See my AMD NB patch,
>
> Can't we still do that by embedding 4 event_constraint structures in
> struct amd_nb and rewriting those as we need?
>
We sure could do that too.
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