From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: ARC-Seal: i=1; a=rsa-sha256; t=1525779776; cv=none; d=google.com; s=arc-20160816; b=gVe8n0Vn9FXlUelj6Ma3XgbPEfZ7+L+tNSu4YQVDLJUSvYsh3Vvoa2ux/ljLAoZVm7 5BtwdFsczYwgU4U0UFYAkIgq0gIAyjcksa7b3W0w/kCWmMKmD0jIq6WP7PnlMP/IsqIt +bQpiPGftwW096JWWQj/pfplTJWpJiVJwOi0t61mgCLD82nosKcHM6maSrxQ2tGdSEci 7+Vha1Qj/FIt3oiSdIW0Z9I2abcNiBkFwmKeB5Lktq1SxzcU/wvfajYOkIIhcTv0AusT MOCW3jeQnrJN+zUOSdzWNxV+T5l4YrMcpMGG7wsunRcKlvXtk/hbNr6SpznFuBfZcer2 L96Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:content-language:in-reply-to:mime-version :user-agent:date:message-id:from:references:to:subject :arc-authentication-results; bh=4D+FPBe14rz8CxlDxp3u+yUB6CxX/NB0EMCAcUy+0q0=; b=JKXApdVfwthKkzKWfUJBZh9xhz0EjrjoKUUGBuS/BmxPvq+UzqMp4Wl4az3DFp0B7J CzHyto3DivEZwx5zO2sSLn+ebSB7Joi2JXegdsqDTgQqpiXN0tFChvCW7uvOk8ZfLQDQ kj0Q2m6gXGR3j9dhDhBx8lypNl3PKV0ZWYZ4BIaIGzNSIRhF3P+L+Msj6aDB5mCkvWno Ub6wgf0E/XK53qWwSxj/R6jPLX5qXOAvU2BsQ+DsLHE4mr3G3iYblYHKCRaiAGVFqsdp JJf2k2mlFW2J81mbFBI4JfykIPiw1u8oKpyNgf74ZzI5EBYk8N2Fh656h2lOE+en+5bU wVSg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of hdegoede@redhat.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=hdegoede@redhat.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Authentication-Results: mx.google.com; spf=pass (google.com: domain of hdegoede@redhat.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=hdegoede@redhat.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com X-Google-Smtp-Source: AB8JxZo8yLM3Zly8DUwdNj0dS7J1EV+a0quSsMbRX6Oh92IZ5X/1xtWHVTaQnHLzims1qf4JO/jj+Q== Subject: Re: Bug in vboxguest: After commit Merge tag 'char-misc-4.17-rc3' To: Greg KH , arnd@arndb.de, linux-kernel@vger.kernel.org References: <20180502193735.GA2444@zrhn9910b> <20180502200615.GB16341@kroah.com> <20180502204612.GA2089@zrhn9910b> From: Hans de Goede Message-ID: Date: Tue, 8 May 2018 13:42:55 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <20180502204612.GA2089@zrhn9910b> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1599382342256929089?= X-GMAIL-MSGID: =?utf-8?q?1599896055462115109?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: Hi Damian, On 02-05-18 22:46, damian wrote: > Hello Greg, > > it is PATCH 3 virt: vbox: Use __get_free_pages insteas of kmalloc for DMA32 memory. Thank you for the bug report, I've tried to reproduce this problem but for me everything works fine. Does your virtual-machine have more then 4G of RAM configured for its use? If yes then what is likely happening is that you also have the out-of-tree version of the vboxguest modules installed and prior to the commit in question the out of tree version of the driver is loading, because before that commit the vboxguest driver in the mainline kernel fails to load on machines with more then 4G. Or alternatively before the commit in question you may not have any version of the vboxguest driver loaded. Using the upstream version of the driver should not make a noticeable difference, but before the vboxguest driver became a part of the mainline kernel the virtualbox upstream developers have done a cleanup / redesign of the userspace API of the vboxguest driver, so the vboxguest driver will only work with recent virtualbox-guest-additions and since you are using Ubuntu 16.04 chances are that you are using that with Ubuntu's quite old bundled virtualbox-guest-additions which will not work with the new driver and may be causing this issue. Can you try upgrading your virtualbox-guest-additions to 5.2.10 please? Also if the above does not help, a couple of follow up questions to help this pin down further: 1) Are you using vbox's 3d pass through functionality 2) Which desktop-environment are you using? Regards, Hans