From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47186) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e8MRJ-0005Hy-Fp for qemu-devel@nongnu.org; Sat, 28 Oct 2017 04:25:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e8MRG-0006TM-CY for qemu-devel@nongnu.org; Sat, 28 Oct 2017 04:25:57 -0400 Received: from mail-wm0-f46.google.com ([74.125.82.46]:51777) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1e8MRG-0006RW-6b for qemu-devel@nongnu.org; Sat, 28 Oct 2017 04:25:54 -0400 Received: by mail-wm0-f46.google.com with SMTP id b9so7452750wmh.0 for ; Sat, 28 Oct 2017 01:25:54 -0700 (PDT) References: <20171027071241.GA30326@localhost.localdomain> <12b21c38-3d03-929b-aea0-7de5efe55d56@ozlabs.ru> From: Paolo Bonzini Message-ID: <9ac46d04-9a6a-67a5-73b3-fa2208c03e35@redhat.com> Date: Sat, 28 Oct 2017 10:25:50 +0200 MIME-Version: 1.0 In-Reply-To: <12b21c38-3d03-929b-aea0-7de5efe55d56@ozlabs.ru> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] iotest 194 fails on vhdx List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Alexey Kardashevskiy , Jeff Cody Cc: Kevin Wolf , "qemu-devel@nongnu.org" , Max Reitz On 28/10/2017 08:57, Alexey Kardashevskiy wrote: > On 27/10/17 18:12, Jeff Cody wrote: >> VHDX does not support migration (VMDK fails the same way). > > Probably a very ignorant question but how can an image format not support > migration at all? Is not it simple writing blocks, one-by-one? Thanks. VHDX does not implement bdrv_invalidate_cache. If you add that callback, it can support migration. Paolo