From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: default elevator=noop for virtio block devices? Date: Wed, 09 Mar 2011 12:01:50 +0200 Message-ID: <4D77500E.5070702@redhat.com> References: <87aah48wa1.fsf@sylvester.afaics.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: KVM Mailing List To: Harald Dunkel Return-path: Received: from mx1.redhat.com ([209.132.183.28]:22703 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756865Ab1CIKCC (ORCPT ); Wed, 9 Mar 2011 05:02:02 -0500 In-Reply-To: <87aah48wa1.fsf@sylvester.afaics.de> Sender: kvm-owner@vger.kernel.org List-ID: On 03/09/2011 11:42 AM, Harald Dunkel wrote: > Hi folks, > > would it make sense to make elevator=noop the default > for virtio block devices? Or would you recommend to > set this on the kvm server instead? > I think leaving the defaults is best. The elevator on the guest serves to schedule I/O among processes in the guest, and the elevator on the host partitions I/O among the guests. -- error compiling committee.c: too many arguments to function