Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752717AbbBESzb (ORCPT ); Thu, 5 Feb 2015 13:55:31 -0500 Received: from goliath.siemens.de ([192.35.17.28]:47611 "EHLO goliath.siemens.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750971AbbBESz3 (ORCPT ); Thu, 5 Feb 2015 13:55:29 -0500 Message-ID: <54D3BC94.9010007@siemens.com> Date: Thu, 05 Feb 2015 19:55:16 +0100 From: Jan Kiszka User-Agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 MIME-Version: 1.0 To: Paolo Bonzini , linux-kernel@vger.kernel.org, kvm@vger.kernel.org CC: riel@redhat.com, rkrcmar@redhat.com, mtosatti@redhat.com Subject: Re: [PATCH RFC] kvm: x86: add halt_poll module parameter References: <1423152325-5094-1-git-send-email-pbonzini@redhat.com> In-Reply-To: <1423152325-5094-1-git-send-email-pbonzini@redhat.com> Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 706 Lines: 18 On 2015-02-05 17:05, Paolo Bonzini wrote: > This patch introduces a new module parameter for the KVM module; when it > is present, KVM attempts a bit of polling on every HLT before scheduling > itself out via kvm_vcpu_block. Wouldn't it be better to tune this on a per-VM basis? Think of mixed workloads with some latency-sensitive and some standard VMs. Jan -- Siemens AG, Corporate Technology, CT RTC ITP SES-DE Corporate Competence Center Embedded Linux -- 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/