From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NpIDg-00065y-6m for qemu-devel@nongnu.org; Wed, 10 Mar 2010 04:28:48 -0500 Received: from [199.232.76.173] (port=53465 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NpIDf-00064y-LZ for qemu-devel@nongnu.org; Wed, 10 Mar 2010 04:28:47 -0500 Received: from Debian-exim by monty-python.gnu.org with spam-scanned (Exim 4.60) (envelope-from ) id 1NpIDe-0006t4-A7 for qemu-devel@nongnu.org; Wed, 10 Mar 2010 04:28:47 -0500 Received: from verein.lst.de ([213.95.11.210]:45909) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_3DES_EDE_CBC_SHA1:24) (Exim 4.60) (envelope-from ) id 1NpIDd-0006sl-Ss for qemu-devel@nongnu.org; Wed, 10 Mar 2010 04:28:46 -0500 Date: Wed, 10 Mar 2010 10:28:43 +0100 From: Christoph Hellwig Subject: Re: [Qemu-devel] Re: [PATCH 0/3]: BLOCK_WATERMARK QMP event Message-ID: <20100310092843.GA19482@lst.de> References: <1268175216-3600-1-git-send-email-lcapitulino@redhat.com> <4B97595B.9050005@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4B97595B.9050005@redhat.com> List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Kevin Wolf Cc: uril@redhat.com, qemu-devel@nongnu.org, Luiz Capitulino 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.