From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from [140.186.70.92] (port=43203 helo=eggs.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1Prva5-0003TP-7b
	for qemu-devel@nongnu.org; Tue, 22 Feb 2011 11:59:26 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <gceq-qemu-devel@m.gmane.org>) id 1PrvZz-00033k-MZ
	for qemu-devel@nongnu.org; Tue, 22 Feb 2011 11:59:16 -0500
Received: from lo.gmane.org ([80.91.229.12]:45105)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <gceq-qemu-devel@m.gmane.org>) id 1PrvZz-00033C-H5
	for qemu-devel@nongnu.org; Tue, 22 Feb 2011 11:59:15 -0500
Received: from list by lo.gmane.org with local (Exim 4.69)
	(envelope-from <gceq-qemu-devel@m.gmane.org>) id 1PrvZx-0005FF-08
	for qemu-devel@nongnu.org; Tue, 22 Feb 2011 17:59:13 +0100
Received: from 93-34-149-100.ip50.fastwebnet.it ([93.34.149.100])
	by main.gmane.org with esmtp (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <qemu-devel@nongnu.org>; Tue, 22 Feb 2011 17:59:12 +0100
Received: from pbonzini by 93-34-149-100.ip50.fastwebnet.it with local (Gmexim
	0.1 (Debian)) id 1AlnuQ-0007hv-00
	for <qemu-devel@nongnu.org>; Tue, 22 Feb 2011 17:59:12 +0100
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Tue, 22 Feb 2011 17:59:01 +0100
Message-ID: <4D63EB55.2000800@redhat.com>
References: <1298369880-23859-1-git-send-email-Jes.Sorensen@redhat.com>	<1298369880-23859-2-git-send-email-Jes.Sorensen@redhat.com>	<AANLkTimrQXxX-4eAmcJstB8g_apaaDqoCf6twhd2t=_D@mail.gmail.com>	<4D63D217.9080206@redhat.com>
	<AANLkTi=kdSyfrqejZjYpmVbtN+_KSuBZVCQ7MzWZ9+if@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
In-Reply-To: <AANLkTi=kdSyfrqejZjYpmVbtN+_KSuBZVCQ7MzWZ9+if@mail.gmail.com>
Subject: [Qemu-devel] Re: [PATCH] For AIO return -ENOSPC on short write
List-Id: qemu-devel.nongnu.org
List-Unsubscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: qemu-devel@nongnu.org
Cc: Kevin Wolf <kwolf@redhat.com>, hch@infradead.org, stefanha@linux.vnet.ibm.com, Jes.Sorensen@redhat.com

On 02/22/2011 04:16 PM, Stefan Hajnoczi wrote:
> Yes it is.  It doesn't explain it though.  The code involved here is
> linux-aio.c and will be qcow2's bs->file.  That ought to be a
> host_device and AFAIK that is not growable.  So I wanted to figure out
> why we're even getting this far.  I expected the request to get
> rejected in block.c when checking the range against the host_device.

Possibly a COW logical volume can give short writes on disk full?

Paolo