linux-kernel - Re: [PATCH 4/4] perf/x86/uncore: modularize Intel uncore driver

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Date:	Wed, 19 Mar 2014 12:42:47 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	"Yan, Zheng" <zheng.z.yan@...el.com>, linux-kernel@...r.kernel.org,
	acme@...radead.org, eranian@...gle.com, andi@...stfloor.org
Subject: Re: [PATCH 4/4] perf/x86/uncore: modularize Intel uncore driver

On Wed, Mar 19, 2014 at 12:32:54PM +0100, Ingo Molnar wrote:
> 
> * Peter Zijlstra <peterz@...radead.org> wrote:
> 
> > On Tue, Mar 18, 2014 at 04:56:44PM +0800, Yan, Zheng wrote:
> > > This patch adds support for building Intel uncore driver as module.
> > > It adds clean-up code and config option for the Intel uncore driver
> > > 
> > > Signed-off-by: Yan, Zheng <zheng.z.yan@...el.com>
> > > ---
> > >  arch/x86/Kconfig                              |  7 ++++
> > >  arch/x86/configs/i386_defconfig               |  1 +
> > >  arch/x86/configs/x86_64_defconfig             |  1 +
> > >  arch/x86/kernel/cpu/Makefile                  |  3 +-
> > >  arch/x86/kernel/cpu/perf_event_intel_uncore.c | 48 ++++++++++++++++++++++++---
> > >  5 files changed, 55 insertions(+), 5 deletions(-)
> > > 
> > > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> > > index 0af5250..8e4e247 100644
> > > --- a/arch/x86/Kconfig
> > > +++ b/arch/x86/Kconfig
> > > @@ -1103,6 +1103,13 @@ config X86_CPUID
> > >  	  with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
> > >  	  /dev/cpu/31/cpuid.
> > >  
> > > +config X86_INTEL_UNCORE
> > > +	tristate "Intel uncore performance monitoring support"
> > > +	depends on CPU_SUP_INTEL
> > > +	---help---
> > > +	  This adds a driver to access the Uncore performance monitoring Units
> > > +	  of Intel processors.
> > > +
> > 
> > Ingo do you agree with this config option placement?
> 
> Yeah, the modularization looks mostly good to me, but its name should 
> lie within the PERF namespace, i.e. CONFIG_PERF_PMU_X86_INTEL_UNCORE=y.

Ah; but do you want this config option hidden in the "Processor type and
features" menu or would they be better in "General setup/Kernel
Performance Events and Counters" ?


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