From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38210) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bHpC2-0003Lb-Iu for qemu-devel@nongnu.org; Tue, 28 Jun 2016 05:20:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bHpBw-0007RF-JZ for qemu-devel@nongnu.org; Tue, 28 Jun 2016 05:20:29 -0400 Received: from mx-v6.kamp.de ([2a02:248:0:51::16]:37382 helo=mx01.kamp.de) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bHpBw-0007RB-9q for qemu-devel@nongnu.org; Tue, 28 Jun 2016 05:20:24 -0400 References: <5770F58F.2080402@kamp.de> <20160627170938.04a7a13c.cornelia.huck@de.ibm.com> <20160628100152-mutt-send-email-mst@redhat.com> <20160628094245.0fefc484.cornelia.huck@de.ibm.com> <57722B75.9090406@kamp.de> <20160628101618.57bdb1e0.cornelia.huck@de.ibm.com> From: Peter Lieven Message-ID: <57724154.2000002@kamp.de> Date: Tue, 28 Jun 2016 11:20:20 +0200 MIME-Version: 1.0 In-Reply-To: <20160628101618.57bdb1e0.cornelia.huck@de.ibm.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] Regression: virtio-pci: convert to ioeventfd callbacks List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Cornelia Huck Cc: "Michael S. Tsirkin" , "qemu-devel@nongnu.org" , famz@redhat.com, stefanha@redhat.com Am 28.06.2016 um 10:16 schrieb Cornelia Huck: > On Tue, 28 Jun 2016 09:47:01 +0200 > Peter Lieven wrote: > >> The problem goes away, but its horribly slow. Maybe the lost notifications >> you were thinking off. > I have the following patch (works for me on ccw as well). I'm worried > about the slowness you're seeing, though. Is this just with an iscsi > backing? Strange enough now neither my nor your version of the fix work for me anymore... I can only reproduce with iSCSI. Neither QCOW2, RAW or NBD work. I think it could have to do with the iSCSI event handler. Peter