From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44885) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ctZ7X-0001zD-3S for qemu-devel@nongnu.org; Thu, 30 Mar 2017 08:24:08 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ctZ7S-0006pZ-6o for qemu-devel@nongnu.org; Thu, 30 Mar 2017 08:24:07 -0400 Received: from mx1.redhat.com ([209.132.183.28]:44172) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ctZ7S-0006p5-0n for qemu-devel@nongnu.org; Thu, 30 Mar 2017 08:24:02 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id F0FFF61BB0 for ; Thu, 30 Mar 2017 12:24:00 +0000 (UTC) Date: Thu, 30 Mar 2017 13:23:54 +0100 From: "Dr. David Alan Gilbert" Message-ID: <20170330122354.GF2800@work-vm> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Subject: [Qemu-devel] xhci migration breakage List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: kraxel@redhat.com Cc: qemu-devel@nongnu.org Hi Gerd, 2.9 seems to have an xhci migration breakage, I've bisected it down to: commit ddb603ab6c981c1d67cb42266fc700c33e5b2d8f Author: Gerd Hoffmann Date: Mon Jan 30 16:36:46 2017 +0100 xhci: don't kick in xhci_submit and xhci_fire_ctl_transfer I guess maybe there's a kick needed pre/post migrate? (it's https://bugzilla.redhat.com/show_bug.cgi?id=1436616 ) The symptoms on the destination are that the qemu prints: qemu-kvm: usb-msd: Bad signature 53425300 and the guest sees: xhci_hcd 0000:00:06.0: WARN Event TRB for slot 1 ep 0 with no TDs queued? xhci_hcd 0000:00:06.0: WARN Event TRB for slot 1 ep 2 with no TDs queued? xhci_hcd 0000:00:06.0: WARN Event TRB for slot 1 ep 3 with no TDs queued? and never gets any more IO on the USB disk. Any ideas? Dave -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK