From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from meesny.iki.fi (meesny.iki.fi [195.140.195.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7D0651635CF for ; Tue, 7 May 2024 15:46:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=195.140.195.201 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715096810; cv=pass; b=gF0W0EJBLSEpk5cAXy0tzZOib5lY2G/rj1WiWxrmy6lLxj+OBb0StPoBkys+8VpndG9ujQzi+Lmf/yh6QA3s4zeDvm+bnA16cjql//BrEa5k0LqJuBeyByU8dF56UVuaVsnLDFtd4RYT8GtDl1w8iY0XiucG9M85vVWoLmpIM6c= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715096810; c=relaxed/simple; bh=5KJcdFFNPo7Xz5KJ9wNhtqFPiCRb1O2wlvRY/A+22iQ=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References: MIME-Version:Content-Type; b=BTnjWjH+9zCCwPAc9WyUc8S8iNkYKeEhuxqr+o5o5efnGbS975Ft+ZT4RlEHfckVw0DhtayZWvCsfmYY9wUW/2WQMdc+GoQr09Eb4NGVul8Td9gDB0ySUUlPKNpzx30D5gDM49aaSvIRdBc8YmzLWFXol3h7pDrRO/fFVIeSKdU= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iki.fi; spf=pass smtp.mailfrom=iki.fi; dkim=pass (1024-bit key) header.d=iki.fi header.i=@iki.fi header.b=G6pP4JHw; arc=pass smtp.client-ip=195.140.195.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iki.fi Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iki.fi Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=iki.fi header.i=@iki.fi header.b="G6pP4JHw" Received: from mail.home (82-181-196-180.bb.dnainternet.fi [82.181.196.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: timo.lindfors) by meesny.iki.fi (Postfix) with ESMTPSA id 4VYjLp08KxzyYP; Tue, 7 May 2024 18:46:41 +0300 (EEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=iki.fi; s=meesny; t=1715096803; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=0blk/HJMbG1YRLdL/uOzQXbl8TjW5wKbD1aD2iGM4w4=; b=G6pP4JHwf9x8Ub2mDvIdjlOGZLegKBJrBHGO5Uwd06+UmCDAb6fsIEcZd7vGs2mXRJzcPG S+e6UjU+3aOM9NAR5FOWuDXfOoFBpgrvy7/Oo7q/hE19Gt3vvVGiwfuT6AVboLwnkBP+7L MBr1H1qeDdZTR/0bVrbkFVhhPhxD/L8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=iki.fi; s=meesny; t=1715096803; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=0blk/HJMbG1YRLdL/uOzQXbl8TjW5wKbD1aD2iGM4w4=; b=D8MUWi3haejgIjSynxdUhNlixs5+zvsAsSW2jF2wtd8zxJDft1YrIMyeRer0fuKUuwMH+u hDrft436l6dzCsRbi4Tk7MxT9ixGJq8YEPRyOyOfPyUkfUt4DTBnicFKYEyGU3AH3bcs/D naj+EOjNDoXall/2+2+Eqo4kIGB0FAI= ARC-Authentication-Results: i=1; ORIGINATING; auth=pass smtp.auth=timo.lindfors smtp.mailfrom=timo.lindfors@iki.fi ARC-Seal: i=1; s=meesny; d=iki.fi; t=1715096803; a=rsa-sha256; cv=none; b=J51sS74+MRNqBrnsDBLpcrw42iVYpeqTbOhYXU0vRXZ6wl+/1CfE76bsCc3nQRT8dzovmf hDveUlf+NV8MtHYr8l/5r0LDMLDV8/D3ebqAXAyT8P8cOnASaLe2jf6cwYjgLJ3UhyuSNs ZykUUazwnstLpbJ6LLgKNGibcQP+SmA= Received: from localhost ([127.0.0.1]) by mail.home with esmtp (Exim 4.89) (envelope-from ) id 1s4N1d-0005WA-HE; Tue, 07 May 2024 18:46:41 +0300 Date: Tue, 7 May 2024 18:46:41 +0300 (EEST) From: Timo Lindfors To: Gerd Hoffmann cc: Timo Lindfors , David Airlie , Linus Torvalds , Maxime Ripard , Steven Rostedt , LKML , Alex Constantino , Maarten Lankhorst , Thomas Zimmermann , Daniel Vetter Subject: Re: [BUG][v6.9-rc6] Deadlock with: Revert "drm/qxl: simplify qxl_fence_wait" In-Reply-To: Message-ID: References: <20240502081641.457aa25f@gandalf.local.home> <20240504043957.417aa98c@rorschach.local.home> <20240506-cuddly-elated-agouti-be981d@houat> User-Agent: Alpine 2.20 (DEB 67 2015-01-07) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed On Tue, 7 May 2024, Gerd Hoffmann wrote: > Worth trying: use vnc. The qemu vnc server will skip updates when the > network pipeline is full. That throttles the frame rate, but also > reduces the display update latency. With Debian 12 it seems that the virtio + vnc + firefox combination results in a black firefox window. Adding MOZ_ENABLE_WAYLAND=1 makes the browser visible but I still see the constant redraw behavior when scrolling. The qxl + spice + firefox combination scrolls smoothly even if I force firefox to use wayland. I suppose I could write a more synthetic test if it would be useful? With systemtap I can trace what happens during a single scroll event. > In general the trend seems to be to move to in-guest remote desktop > solutions. Do NOT make VMs a special case with a special solution, > instead handle VMs like bare metal. Commercial solutions exist for a > while, some of them are doing hardware-assisted video encoding to send > the display as video stream to the remote end. gnome+rdp is a new > player here, clearly worth a try. Yes this makes sense. I'm definitely not trying to stick to a particular technology but instead try to find the best FOSS solution for the use case of hosting linux desktops on a server. -Timo