linux-kernel - Re: [PATCH] perf: Fix intel shared extra msr allocation

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Date:	Tue, 05 Jun 2012 12:27:51 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	"Yan, Zheng" <zheng.z.yan@...ux.intel.com>,
	"Yan, Zheng" <zheng.z.yan@...el.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf: Fix intel shared extra msr allocation

On Tue, 2012-06-05 at 12:21 +0200, Stephane Eranian wrote:
> I agree with the first part of the patch in intel_try_alt_er(), we
> should not touch
> the actual event struct. But I am still unclear about the reg->alloc part.

reg->alloc is part of the actual event.

Thing is, the patch is horridly ugly.. while I agree that changing event
state isn't good, special casing all that code isn't good either.

I was looking at cloning the events for validate_group() as well, but so
far that's not turning out too pretty either.
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