linux-kernel - Re: [PATCH 1/3] x86, perf: Use a new PMU ack sequence

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Message-ID: <20151021214638.GH15102@tassilo.jf.intel.com>
Date:	Wed, 21 Oct 2015 14:46:38 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH 1/3] x86, perf: Use a new PMU ack sequence

> > v2:
> > Use new ack sequence unconditionally. Remove pmu reset code.
> 
> So this is not something we can easily revert if things go bad. Esp.
> since you build on it with the next patches.

Ok, and?

You want me to go back to the previous patch? That one is easily
undoable (just disable the flag for the model)

Another alternative would be to fork the PMI handler into a new and
an old version, that is switchable.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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