From nobody Sun Nov 9 22:30:56 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) client-ip=209.132.183.28; envelope-from=libvir-list-bounces@redhat.com; helo=mx1.redhat.com; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) smtp.mailfrom=libvir-list-bounces@redhat.com; dmarc=pass(p=none dis=none) header.from=redhat.com Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by mx.zohomail.com with SMTPS id 155197152318177.83675398888306; Thu, 7 Mar 2019 07:12:03 -0800 (PST) Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 19708B0ADA; Thu, 7 Mar 2019 15:12:01 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id DDCDE60147; Thu, 7 Mar 2019 15:12:00 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id 9A863181A13D; Thu, 7 Mar 2019 15:12:00 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id x27FBmo4011456 for ; Thu, 7 Mar 2019 10:11:48 -0500 Received: by smtp.corp.redhat.com (Postfix) id DE87EA4FB8; Thu, 7 Mar 2019 15:11:48 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-116-211.ams2.redhat.com [10.36.116.211]) by smtp.corp.redhat.com (Postfix) with ESMTP id 00383A4FBD; Thu, 7 Mar 2019 15:11:47 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 9ABCA17516; Thu, 7 Mar 2019 16:11:41 +0100 (CET) From: Gerd Hoffmann To: qemu-devel@nongnu.org Date: Thu, 7 Mar 2019 16:11:39 +0100 Message-Id: <20190307151141.6483-6-kraxel@redhat.com> In-Reply-To: <20190307151141.6483-1-kraxel@redhat.com> References: <20190307151141.6483-1-kraxel@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-loop: libvir-list@redhat.com Cc: libvir-list@redhat.com, "Dr. David Alan Gilbert" , Gerd Hoffmann , Paolo Bonzini Subject: [libvirt] [PULL 5/7] vnc: fix update stalls X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: libvir-list-bounces@redhat.com Errors-To: libvir-list-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Thu, 07 Mar 2019 15:12:01 +0000 (UTC) Content-Type: text/plain; charset="utf-8" vnc aborts display update jobs on video mode switches and page flips. That can cause vnc update stalls in case an unfinished vnc job gets aborted. The vnc client will never receive the requested update then. Fix that by copying the state from job_update back to update in that case. Reports complain about stalls with two or more clients being connected at the same time, on some but not all connections. I suspect it can also happen with a single connection, multiple connections only make this more much likely to happen. Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=3D1662260 Reported-by: Ying Fang Signed-off-by: Gerd Hoffmann Reviewed-by: Ying Fang Message-id: 20190305130930.24516-1-kraxel@redhat.com --- ui/vnc.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/ui/vnc.c b/ui/vnc.c index da4a21d4ce94..2f2ab62fcf71 100644 --- a/ui/vnc.c +++ b/ui/vnc.c @@ -700,6 +700,12 @@ static void vnc_abort_display_jobs(VncDisplay *vd) } QTAILQ_FOREACH(vs, &vd->clients, next) { vnc_lock_output(vs); + if (vs->update =3D=3D VNC_STATE_UPDATE_NONE && + vs->job_update !=3D VNC_STATE_UPDATE_NONE) { + /* job aborted before completion */ + vs->update =3D vs->job_update; + vs->job_update =3D VNC_STATE_UPDATE_NONE; + } vs->abort =3D false; vnc_unlock_output(vs); } --=20 2.18.1 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list