From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zachary Amsden Subject: [PATCH: kvm 5/5] Math is hard; let's do some cooking. Date: Thu, 24 Sep 2009 14:47:20 -1000 Message-ID: <1253839640-12695-6-git-send-email-zamsden@redhat.com> References: <20090924151049.GB14102@amt.cnet> <1253839640-12695-1-git-send-email-zamsden@redhat.com> <1253839640-12695-2-git-send-email-zamsden@redhat.com> <1253839640-12695-3-git-send-email-zamsden@redhat.com> <1253839640-12695-4-git-send-email-zamsden@redhat.com> <1253839640-12695-5-git-send-email-zamsden@redhat.com> Cc: linux-kernel@vger.kernel.org, Zachary Amsden , Avi Kivity , Marcelo Tosatti To: kvm@vger.kernel.org Return-path: Received: from mx1.redhat.com ([209.132.183.28]:11562 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752681AbZIYAtj (ORCPT ); Thu, 24 Sep 2009 20:49:39 -0400 In-Reply-To: <1253839640-12695-5-git-send-email-zamsden@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: CPU frequency change callback provides new TSC frequency for us, and in the same units (kHz), so there is no reason to do any math. Signed-off-by: Zachary Amsden --- arch/x86/kvm/x86.c | 5 +---- 1 files changed, 1 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 66c6bb9..60ae2c7 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3070,15 +3070,12 @@ static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long va struct kvm *kvm; struct kvm_vcpu *vcpu; int i, send_ipi = 0; - unsigned long old_khz; if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) return 0; if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) return 0; - old_khz = per_cpu(cpu_tsc_khz, freq->cpu); - per_cpu(cpu_tsc_khz, freq->cpu) = cpufreq_scale(old_khz, freq->old, - freq->new); + per_cpu(cpu_tsc_khz, freq->cpu) = freq->new; spin_lock(&kvm_lock); list_for_each_entry(kvm, &vm_list, vm_list) { -- 1.6.4.4