From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1KqPXr-00063U-40 for qemu-devel@nongnu.org; Thu, 16 Oct 2008 05:53:27 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1KqPXq-00063A-9f for qemu-devel@nongnu.org; Thu, 16 Oct 2008 05:53:26 -0400 Received: from [199.232.76.173] (port=41820 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1KqPXq-000634-3D for qemu-devel@nongnu.org; Thu, 16 Oct 2008 05:53:26 -0400 Received: from mx2.redhat.com ([66.187.237.31]:42122) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1KqPXp-0002aP-M1 for qemu-devel@nongnu.org; Thu, 16 Oct 2008 05:53:26 -0400 Message-ID: <48F70DBF.10307@redhat.com> Date: Thu, 16 Oct 2008 11:47:43 +0200 From: Avi Kivity MIME-Version: 1.0 Subject: Re: [Qemu-devel] [RFC] Disk integrity in QEMU References: <48EE38B9.2050106@codemonkey.ws> <48EF1D55.7060307@redhat.com> <48F0E83E.2000907@redhat.com> <48F10DFD.40505@codemonkey.ws> <20081012004401.GA9763@acer.localdomain> <48F1CF9E.9030500@redhat.com> <48F23AF1.2000104@codemonkey.ws> <48F24320.9010201@redhat.com> <48F25720.9010306@codemonkey.ws> <48F26171.70109@redhat.com> <48F2681A.1030401@codemonkey.ws> <48F4B904.6000608@redhat.com> <1224012341.4177.6.camel@frecb07144> In-Reply-To: <1224012341.4177.6.camel@frecb07144> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Laurent Vivier Cc: Chris Wright , Mark McLoughlin , kvm-devel , qemu-devel@nongnu.org, Ryan Harper Laurent Vivier wrote: >> I am assuming that we will provide true O_DIRECT support soon. >> > > If you remember, I tried to introduce zero copy when I wrote the > "cache=off" patch: > > http://thread.gmane.org/gmane.comp.emulators.qemu/22148/focus=22149 > > but it was not correct (see Fabrice comment). > Yes, this is not trivial, especially if we want to provide good support for all qemu targets. -- error compiling committee.c: too many arguments to function