From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1M1L5V-0004IV-2l for qemu-devel@nongnu.org; Tue, 05 May 2009 09:53:37 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1M1L5Q-0004Hb-Ea for qemu-devel@nongnu.org; Tue, 05 May 2009 09:53:36 -0400 Received: from [199.232.76.173] (port=50894 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1M1L5Q-0004HW-9b for qemu-devel@nongnu.org; Tue, 05 May 2009 09:53:32 -0400 Received: from mx2.redhat.com ([66.187.237.31]:59049) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1M1L5P-0000rC-Io for qemu-devel@nongnu.org; Tue, 05 May 2009 09:53:31 -0400 Message-ID: <4A0044D5.5010402@redhat.com> Date: Tue, 05 May 2009 16:53:25 +0300 From: Avi Kivity MIME-Version: 1.0 Subject: Re: [Qemu-devel] [PATCH 0/3] write barrier support References: <20090505120804.GA30651@lst.de> In-Reply-To: <20090505120804.GA30651@lst.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Christoph Hellwig Cc: qemu-devel@nongnu.org Christoph Hellwig wrote: > Add support for write barriers that allow guests to control write > ordering when write back cachin is enabled. > > For now only the simple stack of virtio on posix raw/host devices is > supported. > I suggest emulating barriers for format drivers that don't support them by queuing the writes in the block layer and issuing a flush_all command. -- error compiling committee.c: too many arguments to function