From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755527AbZKDLoW (ORCPT ); Wed, 4 Nov 2009 06:44:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755415AbZKDLoW (ORCPT ); Wed, 4 Nov 2009 06:44:22 -0500 Received: from www.tglx.de ([62.245.132.106]:40039 "EHLO www.tglx.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755320AbZKDLoV (ORCPT ); Wed, 4 Nov 2009 06:44:21 -0500 Date: Wed, 4 Nov 2009 12:43:57 +0100 (CET) From: Thomas Gleixner To: LKML cc: Thierry Vignaud , bugzilla-daemon@bugzilla.kernel.org, "Rafael J. Wysocki" Subject: Re: [Bug 14537] New: missing compat_ioctl on x86_64 In-Reply-To: Message-ID: References: User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org B1;2005;0c(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Tue, 3 Nov 2009, bugzilla-daemon@bugzilla.kernel.org wrote: > http://bugzilla.kernel.org/show_bug.cgi?id=14537 > > Summary: missing compat_ioctl on x86_64 > Product: Platform Specific/Hardware > Version: 2.5 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: x86-64 > AssignedTo: platform_x86_64@kernel-bugs.osdl.org > ReportedBy: tvignaud@mandriva.com > Regression: No > > > I used to run 64bit userspace on 64bit kernel but I recently tried to run a > 64bit kernel with as minimal as possible as 64bit userspace (that is > rpm+glibc+... in order to mananage 64bit kernel packages). > > This revealed several missing compat_ioctl. > Running 32bit gnome-terminal on a 64 bit kernel results in the following in > dmesg: > > - with gnome-terminal: > ioctl32(gnome-terminal:1755): Unknown cmd fd(19) cmd(0000530b){t:'S';sz:0} > arg(48111345) on /dev/pts/0 > ioctl32(gnome-terminal:1755): Unknown cmd fd(19) cmd(0000530b){t:'S';sz:0} > arg(4811134a) on /dev/pts/0 > ioctl32(gnome-terminal:1755): Unknown cmd fd(19) cmd(0000530b){t:'S';sz:0} > arg(48111351) on /dev/pts/0 That looks more like an application problem. 'S' is SNDRV_SEQ_IOCTL which has no ioctl nr 0xb. Also I have no idea why a sound sequencer ioctl should work on /dev/pts/0 :) > - with X: > ioctl32(X:2803): Unknown cmd fd(0) cmd(40086408){t:'d';sz:8} arg(ff840a68) on > /var/log/Xorg.0.log > ioctl32(X:2803): Unknown cmd fd(0) cmd(40086408){t:'d';sz:8} arg(ff840a68) on > /var/log/Xorg.0.log 'd' is used by pcmcia and DRM. DRM sounds more likely for X, but I have a hard time to understand why a DRM ioctl should work on /var/log/Xorg.0.log :) For both gnome-terminal and X strace should tell you more. > - when trying to suspend: > ioctl32(s2disk:8164): Unknown cmd fd(4) cmd(400c330d){t:'3';sz:12} > arg(ffc190ec) on /dev/snapshot > ioctl32(s2disk:8164): Unknown cmd fd(4) cmd(4004330a){t:'3';sz:4} arg(00000806) > on /dev/snapshot snapshot_ioctl seems to lack compat support completely. Raphael ?? > Of course we'd better run 64bit userspace on 64bit kernel but 32bit > applications are supposed to still work. > Some may say some of them are too hardware specific but still it would be best > to fix them... > > Tested with 2.6.31.5 and 2.6.32-rc5. Thanks, tglx