From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NpTBY-0008SH-68 for qemu-devel@nongnu.org; Wed, 10 Mar 2010 16:11:20 -0500 Received: from [199.232.76.173] (port=39094 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NpTBX-0008S6-Fv for qemu-devel@nongnu.org; Wed, 10 Mar 2010 16:11:19 -0500 Received: from Debian-exim by monty-python.gnu.org with spam-scanned (Exim 4.60) (envelope-from ) id 1NpTBW-0004Ws-E6 for qemu-devel@nongnu.org; Wed, 10 Mar 2010 16:11:19 -0500 Received: from mx1.redhat.com ([209.132.183.28]:18334) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1NpTBW-0004Wk-2p for qemu-devel@nongnu.org; Wed, 10 Mar 2010 16:11:18 -0500 Date: Wed, 10 Mar 2010 18:11:07 -0300 From: Luiz Capitulino Subject: Re: [Qemu-devel] Re: [PATCH 0/3]: BLOCK_WATERMARK QMP event Message-ID: <20100310181107.494ef0ab@redhat.com> In-Reply-To: <20100310092843.GA19482@lst.de> References: <1268175216-3600-1-git-send-email-lcapitulino@redhat.com> <4B97595B.9050005@redhat.com> <20100310092843.GA19482@lst.de> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Christoph Hellwig Cc: Kevin Wolf , uril@redhat.com, qemu-devel@nongnu.org On Wed, 10 Mar 2010 10:28:43 +0100 Christoph Hellwig wrote: > On Wed, Mar 10, 2010 at 09:33:31AM +0100, Kevin Wolf wrote: > > When should a low watermark trigger? Images only ever grow, so testing > > if the highest allocated block goes below some watermark would never > > work (except for some unlikely special cases like deleting a snapshot > > after which no new clusters have been allocated). > > Wither proper guest support images can shrink. I'm about to land > support for that in qemu, although for now just for every limited > setups. It were this kind of future functionality I was concerned about.