From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1IQP21-00016i-Nz for qemu-devel@nongnu.org; Wed, 29 Aug 2007 11:00:33 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1IQP20-00014m-60 for qemu-devel@nongnu.org; Wed, 29 Aug 2007 11:00:32 -0400 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1IQP20-00014c-1q for qemu-devel@nongnu.org; Wed, 29 Aug 2007 11:00:32 -0400 Received: from hibernia.jakma.org ([212.17.55.49]) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1IQP1z-000432-4S for qemu-devel@nongnu.org; Wed, 29 Aug 2007 11:00:31 -0400 Date: Wed, 29 Aug 2007 15:58:25 +0100 (IST) From: Paul Jakma Subject: Re: [Qemu-devel] Re: [et-mgmt-tools] Image Corruption Possible with qemu and qemu-kvm In-Reply-To: <1188248558.21696.1.camel@squirrel> Message-ID: References: <46D2EC13.8020005@bppiac.hu> <1188232650.25884.100.camel@localhost.localdomain> <20070827202748.GK9043@redhat.com> <1188248558.21696.1.camel@squirrel> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Reply-To: Paul Jakma , qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Fedora/Linux Management Tools On Mon, 27 Aug 2007, Anthony Liguori wrote: > I think this is the right level myself. Advisory locks work okay but > not all filesystems support them. It's particularly nasty when you have > a clustered filesystem in the host. I think it would do more harm than > good to have a feature like that was supposed to provide a safe-guard > but then frequently didn't work. ^^^^^^^^^^^^^^^^^^^^^^ Are you trying to say that any kind of significant portion of QEMU users have clustered file-systems? I think that's unlikely, and it'd be nice if QEMU by default did a fcntl() on writeable image files to lock itself from multiple access, that'd benefit the vast majority of users. Let the 0.x% of users who need to run with weird/esoteric fses cope.. regards, -- Paul Jakma paul@clubi.ie paul@jakma.org Key ID: 64A2FF6A Fortune: Fashions have done more harm than revolutions. -- Victor Hugo