linux-kernel - [PATCH 0/2] combine remote cpu msr access

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Message-Id: <1449873637-24300-1-git-send-email-jacob.jun.pan@linux.intel.com>
Date:	Fri, 11 Dec 2015 14:40:35 -0800
From:	Jacob Pan <jacob.jun.pan@...ux.intel.com>
To:	LKML <linux-kernel@...r.kernel.org>,
	Linux PM <linux-pm@...r.kernel.org>,
	Rafael Wysocki <rafael.j.wysocki@...el.com>
Cc:	Peter Zijlstra <peterz@...radead.org>, X86 Kernel <x86@...nel.org>,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Jacob Pan <jacob.jun.pan@...ux.intel.com>
Subject: [PATCH 0/2] combine remote cpu msr access

IPI calls to access MSRs on remote CPUs are expensive. So add a lib call
for read/modify/write access and use it in Intel RAPL driver.

Jacob Pan (2):
  x86/msr: add on cpu read/modify/write function
  powercap/rapl: reduce ipi calls

 arch/x86/include/asm/msr.h    | 24 +++++++++++++++
 arch/x86/lib/msr-smp.c        | 47 ++++++++++++++++++++++++++++
 drivers/powercap/intel_rapl.c | 71 ++++++++++++++++++++++---------------------
 3 files changed, 108 insertions(+), 34 deletions(-)

-- 
1.9.1

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