From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@bugzilla.kernel.org Subject: [Bug 107561] 4.2 breaks PCI passthrough in QEMU/KVM Date: Thu, 12 Nov 2015 22:20:41 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit To: kvm@vger.kernel.org Return-path: Received: from mail.kernel.org ([198.145.29.136]:51788 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754026AbbKLWUr (ORCPT ); Thu, 12 Nov 2015 17:20:47 -0500 Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CDDB7207D7 for ; Thu, 12 Nov 2015 22:20:44 +0000 (UTC) Received: from bugzilla1.web.kernel.org (bugzilla1.web.kernel.org [172.20.200.51]) by mail.kernel.org (Postfix) with ESMTP id 38E4D207DA for ; Thu, 12 Nov 2015 22:20:42 +0000 (UTC) In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: https://bugzilla.kernel.org/show_bug.cgi?id=107561 John Brooks changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |kbt@fastquake.com --- Comment #1 from John Brooks --- I can confirm this bug. As soon as I enabled PCI passthrough on my VM while using kernel 4.2.2, my VM ran extremely slowly, and increasing the amount of RAM made the problem worse. Switching to kernel 4.1.12 fixed the problem. -- You are receiving this mail because: You are watching the assignee of the bug.