From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58973) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XmSMu-0007w4-Vi for qemu-devel@nongnu.org; Thu, 06 Nov 2014 14:05:26 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XmSMk-0005kA-8K for qemu-devel@nongnu.org; Thu, 06 Nov 2014 14:05:16 -0500 Received: from e06smtp14.uk.ibm.com ([195.75.94.110]:36270) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XmSMj-0005fO-Ue for qemu-devel@nongnu.org; Thu, 06 Nov 2014 14:05:06 -0500 Received: from /spool/local by e06smtp14.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 6 Nov 2014 19:05:04 -0000 Received: from b06cxnps4075.portsmouth.uk.ibm.com (d06relay12.portsmouth.uk.ibm.com [9.149.109.197]) by d06dlp02.portsmouth.uk.ibm.com (Postfix) with ESMTP id CE0B02190041 for ; Thu, 6 Nov 2014 19:04:36 +0000 (GMT) Received: from d06av09.portsmouth.uk.ibm.com (d06av09.portsmouth.uk.ibm.com [9.149.37.250]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id sA6J52ON196956 for ; Thu, 6 Nov 2014 19:05:02 GMT Received: from d06av09.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av09.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id sA6J51rf015620 for ; Thu, 6 Nov 2014 12:05:01 -0700 Message-ID: <545BC65C.3020000@de.ibm.com> Date: Thu, 06 Nov 2014 20:05:00 +0100 From: Christian Borntraeger MIME-Version: 1.0 References: <1406636839-11946-1-git-send-email-tumanova@linux.vnet.ibm.com> <545B9A92.4030802@de.ibm.com> <545BAEC9.1090404@redhat.com> In-Reply-To: <545BAEC9.1090404@redhat.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] Geometry and blocksize support for backing devices List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paolo Bonzini , Markus Armbruster , Stefan Hajnoczi , Kevin Wolf Cc: cornelia.huck@de.ibm.com, dahi@linux.vnet.ibm.com, Ekaterina Tumanova , qemu-devel@nongnu.org, Viktor Mihajlovski Am 06.11.2014 18:24, schrieb Paolo Bonzini: > > On 06/11/2014 16:58, Christian Borntraeger wrote: >> Now here comes my proposal: >> Markus statement brought up an idea of special casing DASDs support. We can >> call an ioctl BIODASDINFO on the block device that will only succeed if the host >> disk is really a dasd. We could enable the auto detection for that case. > > That would be enough for me, actually. Its certainly enough for us as well. Stefan, Markus, Kevin, can Kate go on with this direction? Christian