From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: kvm-77 Excessive Disk Access causes real time clock hang! Date: Wed, 29 Apr 2009 11:21:39 +0300 Message-ID: <49F80E13.2070806@redhat.com> References: <49F1DAF5.2060805@rdsoftware.de> <49F43B77.4080102@redhat.com> <49F4EA48.2070208@rdsoftware.de> <49F55051.1000409@redhat.com> <49F5E936.1050706@rdsoftware.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Erik Rull Return-path: Received: from mx2.redhat.com ([66.187.237.31]:41757 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757142AbZD2IVp (ORCPT ); Wed, 29 Apr 2009 04:21:45 -0400 In-Reply-To: <49F5E936.1050706@rdsoftware.de> Sender: kvm-owner@vger.kernel.org List-ID: Erik Rull wrote: > Hi Avi, > > Avi Kivity wrote: >> interface: virtio >> cache: none >> format: raw, using a partition or logical volume >> >> What are you using? > > uhm, I'm not sure, I call qemu with: > > qemu-system-x86_64 -usb -hda /dev/hda2 -m 1536 -net > nic,macaddr=$MACADDR -net tap,script=/etc/qemu-ifup -no-acpi -monitor > stdio -usbdevice tablet -boot c > > The /dev/hda2 is NTFS formatted - does this make sense, because you > wrote sth. with raw... > Maybe another file system would be faster? Or is it ignored by the > guest system? The file system is the guest's business. Instead of '-hda /dev/hda2', try -drive file=/dev/hda2,cache=none -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.