Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932227AbaLDNxi (ORCPT ); Thu, 4 Dec 2014 08:53:38 -0500 Received: from mail-wi0-f174.google.com ([209.85.212.174]:44634 "EHLO mail-wi0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932110AbaLDNxg (ORCPT ); Thu, 4 Dec 2014 08:53:36 -0500 Message-ID: <54806756.30503@redhat.com> Date: Thu, 04 Dec 2014 14:53:26 +0100 From: Paolo Bonzini User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 MIME-Version: 1.0 Newsgroups: gmane.linux.kernel,gmane.comp.emulators.kvm.devel To: Thomas Gleixner , Rik van Riel CC: Marcelo Tosatti , linux-kernel@vger.kernel.org, Luiz Capitulino , Steven Rostedt , kvm@vger.kernel.org Subject: Re: [patch -rt 2/2] KVM: lapic: mark LAPIC timer handler as irqsafe References: <20141125172108.992070524@redhat.com> <20141125172329.580701786@redhat.com> <5474D476.3020506@redhat.com> In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 25/11/2014 21:24, Thomas Gleixner wrote: > On Tue, 25 Nov 2014, Rik van Riel wrote: >> On 11/25/2014 12:21 PM, Marcelo Tosatti wrote: >>> Since lapic timer handler only wakes up a simple waitqueue, >>> it can be executed from hardirq context. >>> >>> Reduces average cyclictest latency by 3us. >> >> Can this patch be merged in the KVM tree, and go >> upstream via Paolo? > > Not really as it has RT dependencies .... Can hrtimer_start_expires even return ETIME on a non-RT kernel? If yes, I can take patch 2. If not, it's better to keep both patches in the RT tree. Paolo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/