From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756017Ab1KHP0I (ORCPT ); Tue, 8 Nov 2011 10:26:08 -0500 Received: from mail-vx0-f174.google.com ([209.85.220.174]:37590 "EHLO mail-vx0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755159Ab1KHP0E convert rfc822-to-8bit (ORCPT ); Tue, 8 Nov 2011 10:26:04 -0500 MIME-Version: 1.0 In-Reply-To: <20111108145257.GA10846@infradead.org> References: <1320543320-32728-1-git-send-email-agraf@suse.de> <4EB93FA4.8020800@redhat.com> <20111108145257.GA10846@infradead.org> Date: Tue, 8 Nov 2011 17:26:03 +0200 X-Google-Sender-Auth: gCQGsG7sWNbdbaZQ0uaN_KDLaJA Message-ID: Subject: Re: [PATCH] KVM: Add wrapper script around QEMU to test kernels From: Pekka Enberg To: Christoph Hellwig Cc: Avi Kivity , Alexander Graf , Linus Torvalds , Ingo Molnar , "linux-kernel@vger.kernel.org List" , "kvm@vger.kernel.org list" , qemu-devel Developers , "Am?rico Wang" , Blue Swirl Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 8, 2011 at 4:52 PM, Christoph Hellwig wrote: > Nevermind that running virtfs as a rootfs is a really dumb idea.  You > do now want to run a VM that has a rootfs that gets changed all the > time behind your back. It's rootfs binaries that are shared, not configuration. It's unfortunate but works OK for the single user use case it's meant for. It's obviously not a proper solution for the generic case. We were hoping that we could use something like overlayfs to hide the issue under the rug. Do you think that's also a really dumb thing to do? Using block device snapshotting would be interesting and we should definitely look into that. Pekka From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pekka Enberg Subject: Re: [PATCH] KVM: Add wrapper script around QEMU to test kernels Date: Tue, 8 Nov 2011 17:26:03 +0200 Message-ID: References: <1320543320-32728-1-git-send-email-agraf@suse.de> <4EB93FA4.8020800@redhat.com> <20111108145257.GA10846@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: "kvm@vger.kernel.org list" , qemu-devel Developers , "linux-kernel@vger.kernel.org List" , Alexander Graf , Blue Swirl , Avi Kivity , Am?rico Wang , Ingo Molnar , Linus Torvalds To: Christoph Hellwig Return-path: In-Reply-To: <20111108145257.GA10846@infradead.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org Sender: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org List-Id: kvm.vger.kernel.org On Tue, Nov 8, 2011 at 4:52 PM, Christoph Hellwig wrote= : > Nevermind that running virtfs as a rootfs is a really dumb idea. =A0You > do now want to run a VM that has a rootfs that gets changed all the > time behind your back. It's rootfs binaries that are shared, not configuration. It's unfortunate but works OK for the single user use case it's meant for. It's obviously not a proper solution for the generic case. We were hoping that we could use something like overlayfs to hide the issue under the rug. Do you think that's also a really dumb thing to do? Using block device snapshotting would be interesting and we should definitely look into that. Pekka From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:55417) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RNnYx-00054r-Ej for qemu-devel@nongnu.org; Tue, 08 Nov 2011 10:26:12 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RNnYq-0000qP-V5 for qemu-devel@nongnu.org; Tue, 08 Nov 2011 10:26:11 -0500 Received: from mail-vx0-f173.google.com ([209.85.220.173]:62958) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RNnYq-0000qI-KK for qemu-devel@nongnu.org; Tue, 08 Nov 2011 10:26:04 -0500 Received: by vcbf13 with SMTP id f13so529958vcb.4 for ; Tue, 08 Nov 2011 07:26:04 -0800 (PST) MIME-Version: 1.0 Sender: penberg@gmail.com In-Reply-To: <20111108145257.GA10846@infradead.org> References: <1320543320-32728-1-git-send-email-agraf@suse.de> <4EB93FA4.8020800@redhat.com> <20111108145257.GA10846@infradead.org> Date: Tue, 8 Nov 2011 17:26:03 +0200 Message-ID: From: Pekka Enberg Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Subject: Re: [Qemu-devel] [PATCH] KVM: Add wrapper script around QEMU to test kernels List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Christoph Hellwig Cc: "kvm@vger.kernel.org list" , qemu-devel Developers , "linux-kernel@vger.kernel.org List" , Alexander Graf , Blue Swirl , Avi Kivity , Am?rico Wang , Ingo Molnar , Linus Torvalds On Tue, Nov 8, 2011 at 4:52 PM, Christoph Hellwig wrote= : > Nevermind that running virtfs as a rootfs is a really dumb idea. =A0You > do now want to run a VM that has a rootfs that gets changed all the > time behind your back. It's rootfs binaries that are shared, not configuration. It's unfortunate but works OK for the single user use case it's meant for. It's obviously not a proper solution for the generic case. We were hoping that we could use something like overlayfs to hide the issue under the rug. Do you think that's also a really dumb thing to do? Using block device snapshotting would be interesting and we should definitely look into that. Pekka