From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=33032 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OBxJd-00066s-De for qemu-devel@nongnu.org; Tue, 11 May 2010 17:48:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OBxJb-0001Z7-VX for qemu-devel@nongnu.org; Tue, 11 May 2010 17:48:37 -0400 Received: from mail2.shareable.org ([80.68.89.115]:60886) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OBxJb-0001Yv-R3 for qemu-devel@nongnu.org; Tue, 11 May 2010 17:48:35 -0400 Date: Tue, 11 May 2010 22:48:32 +0100 From: Jamie Lokier Subject: Re: [Qemu-devel] [PATCH 0/2] Enable qemu block layer to not flush Message-ID: <20100511214832.GC30446@shareable.org> References: <1273528310-7051-1-git-send-email-agraf@suse.de> <4BE881CB.3070303@codemonkey.ws> <4BE884E0.5020703@codemonkey.ws> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4BE884E0.5020703@codemonkey.ws> List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Anthony Liguori , g@shareable.org Cc: kwolf@redhat.com, hch@lst.de, Alexander Graf , qemu-devel@nongnu.org Anthony Liguori wrote: > There's got to be a better place to fix this. Disable barriers in your > guests? If only it were that easy. OS installs are the thing that this feature would most help. They take ages, do a huge amount of writing with lots of seeking, and if the host fails you're going to discard the image. I'm not sure how I would change that setting for most OS install GUIs, especially Windows, or if it's even possible. It's usually much easier to change barrier settings after installing and you've got a command line or registry editing tool. But by then, it's not useful any more. Any other ideas? -- Jamie