Date: Sat, 29 Aug 2015 11:19:14 +0200
From: Ingo Molnar <mingo@kernel.org>
To: Borislav Petkov <bp@alien8.de>
Cc: Huang Rui <ray.huang@amd.com>, Borislav Petkov <bp@suse.de>,
        Jean Delvare <jdelvare@suse.de>, Guenter Roeck <linux@roeck-us.net>,
        Andy Lutomirski <luto@amacapital.net>,
        Andreas Herrmann <herrmann.der.user@gmail.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Peter Zijlstra <peterz@infradead.org>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>, Len Brown <lenb@kernel.org>,
        John Stultz <john.stultz@linaro.org>,
        =?iso-8859-1?Q?Fr=E9d=E9ric?= Weisbecker <fweisbec@gmail.com>,
        lm-sensors@lm-sensors.org, linux-kernel@vger.kernel.org,
        x86@kernel.org, Andreas Herrmann <herrmann.der.user@googlemail.com>,
        Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>,
        Fengguang Wu <fengguang.wu@intel.com>, Aaron Lu <aaron.lu@intel.com>,
        Tony Li <tony.li@amd.com>
Subject: Re: [PATCH 09/15] x86, amd: add accessor for number of cores per
 compute unit
Message-ID: <20150829091914.GA8878@gmail.com>
References: <1440662866-28716-1-git-send-email-ray.huang@amd.com>
 <1440662866-28716-10-git-send-email-ray.huang@amd.com>
 <20150828064814.GB20153@nazgul.tnic>
 <20150828080418.GB13309@gmail.com>
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* Ingo Molnar <mingo@kernel.org> wrote:

> 
> * Borislav Petkov <bp@alien8.de> wrote:
> 
> > On Thu, Aug 27, 2015 at 04:07:40PM +0800, Huang Rui wrote:
> > > Add an accessor function amd_get_cores_per_cu() which returns the
> > > number of cores per compute unit.
> > > 
> > > In a subsequent patch, we will use this function in fam15h_power
> > > driver.
> > > 
> > > Signed-off-by: Huang Rui <ray.huang@amd.com>
> > > ---
> > >  arch/x86/include/asm/processor.h |  1 +
> > >  arch/x86/kernel/cpu/amd.c        | 19 +++++++++++++++++--
> > >  2 files changed, 18 insertions(+), 2 deletions(-)
> > 
> > Btw, this needs an ACK from a tip person if it goes through the hwmon
> > tree.
> 
> Looks good to me in theory.
> 
> I suspect we might want to factor the 'compute unit' logic out a bit more if usage 
> becomes more widespread - but right now it's hwmon drivers only,right?

So let me withdraw my ack: the much more important question that I missed first 
time around, why is this reporting feature living in hwmon, not in perf? We have 
energy reporting facilities in perf that this should be synced to.

Thanks,

	Ingo
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