linux-kernel - Re: [PATCH v6 02/11] perf/x86/intel/pt: Change pt_cap

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Message-ID: <20180430135904.GB12258@hirez.programming.kicks-ass.net>
Date:   Mon, 30 Apr 2018 15:59:04 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Luwei Kang <luwei.kang@...el.com>
Cc:     kvm@...r.kernel.org, tglx@...utronix.de, mingo@...hat.com,
        hpa@...or.com, x86@...nel.org, pbonzini@...hat.com,
        rkrcmar@...hat.com, linux-kernel@...r.kernel.org, joro@...tes.org,
        Chao Peng <chao.p.peng@...ux.intel.com>
Subject: Re: [PATCH v6 02/11] perf/x86/intel/pt: Change pt_cap_get() to a
 public function

On Tue, Mar 20, 2018 at 07:21:49PM +0800, Luwei Kang wrote:
> From: Chao Peng <chao.p.peng@...ux.intel.com>
> 
> Change pt_cap_get() to a public function so that KVM can access it.
> Introduce new capablility PT_CAP_output_subsys to support
> of output to Trace Transport subsystem.

That is again, more than a single change.

Also, the Changelog is far too terse, why do you need a new capability?