From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@bugzilla.kernel.org Subject: [Bug 196409] kvm_amd nested pagetable gpu passthrough performance oddities Date: Thu, 20 Jul 2017 18:53:32 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT To: kvm@kernel.org Return-path: Received: from mail.wl.linuxfoundation.org ([198.145.29.98]:36088 "EHLO mail.wl.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934584AbdGTSxo (ORCPT ); Thu, 20 Jul 2017 14:53:44 -0400 Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7D22E28852 for ; Thu, 20 Jul 2017 18:53:44 +0000 (UTC) In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: https://bugzilla.kernel.org/show_bug.cgi?id=196409 Michael (michael.osmolski@gmail.com) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |michael.osmolski@gmail.com --- Comment #1 from Michael (michael.osmolski@gmail.com) --- I too have this NPT issue with Ryzen 1800x and KVM latest kernel. It's incredible that no-one has managed to resolve this yet. GPU performance is absolutely dire with npt=1 and CPU is so bad with npt=0. So loss/loss situation. -- You are receiving this mail because: You are watching the assignee of the bug.