From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756488AbbJ1XF3 (ORCPT ); Wed, 28 Oct 2015 19:05:29 -0400 Received: from shelob.surriel.com ([74.92.59.67]:58278 "EHLO shelob.surriel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756312AbbJ1XFI (ORCPT ); Wed, 28 Oct 2015 19:05:08 -0400 From: riel@redhat.com To: linux-kernel@vger.kernel.org Cc: arjan@linux.intel.com, khilman@ti.com, len.brown@intel.com, rafael.j.wysocki@intel.com, daniel.lezcano@linaro.org, javi.merino@arm.com, tuukka.tikkanen@linaro.org Subject: [PATCH 0/3] cpuidle: small improvements & fixes for menu governor Date: Wed, 28 Oct 2015 18:46:53 -0400 Message-Id: <1446072416-13622-1-git-send-email-riel@redhat.com> X-Mailer: git-send-email 2.1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org While working on a paravirt cpuidle driver for KVM guests, I noticed a number of small logic errors in the menu governor code. These patches should get rid of some artifacts that can break the logic in the menu governor under certain corner cases, and make idle state selection work better on CPUs with long C1 exit latencies. I have not seen any adverse effects with them in my (quick) tests. As expected, they do not seem to do much on systems with many power states and very low C1 exit latencies and target residencies.