Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422778AbWHSVIj (ORCPT ); Sat, 19 Aug 2006 17:08:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1422782AbWHSVIj (ORCPT ); Sat, 19 Aug 2006 17:08:39 -0400 Received: from ug-out-1314.google.com ([66.249.92.173]:41 "EHLO ug-out-1314.google.com") by vger.kernel.org with ESMTP id S1422778AbWHSVIi (ORCPT ); Sat, 19 Aug 2006 17:08:38 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:date:from:to:cc:subject:message-id:references:mime-version:content-type:content-disposition:in-reply-to:user-agent:sender; b=piL0/sDBZ/DdqKxWXCUrhci0c0nuTbUPRn5HKsaFY5Y6x+pYM4EQaDw+MOHYgxPpU1Nmvrxd98KmDSu9ABos5uRP+vEo3pMHAKa8qfFimicTOPe9uPmDa7MtJt5llFOt28obOflC+OOwGI1/VBsj15HZA6zJ4uXF1+jYKTXoSXo= Date: Sat, 19 Aug 2006 23:08:21 +0000 From: Frederik Deweerdt To: Andrew Morton Cc: linux-kernel@vger.kernel.org, airlied@linux.ie Subject: Re: 2.6.18-rc4-mm1 BUG, drm relatedy Message-ID: <20060819230821.GE720@slug> References: <20060813012454.f1d52189.akpm@osdl.org> <20060815130345.GA3817@slug> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060815130345.GA3817@slug> User-Agent: mutt-ng/devel-r804 (Linux) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6244 Lines: 124 On Tue, Aug 15, 2006 at 01:25:56PM +0000, Frederik Deweerdt wrote: > On Sun, Aug 13, 2006 at 01:24:54AM -0700, Andrew Morton wrote: > > > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.18-rc4/2.6.18-rc4-mm1/ > > > Hi, > > There are two BUGs with 2.6.18-rc4-mm1 that seem related to (I did the > bisection[1]): > git-drm.patch > drm-build-fix.patch > drm-build-fixes-2.patch > allow-drm-detection-of-new-via-chipsets.patch > git-drm-build-fix.patch > > Here's one of the BUGs (the second one is on the web site below). > [ 40.276000] [drm:drm_unlock] *ERROR* Process 8914 using kernel context 0 > [ 41.024000] BUG: unable to handle kernel paging request at virtual address 6e756f73 > [ 41.024000] printing eip: > [ 41.024000] c01b5771 > [ 41.024000] *pde = 00000000 > [ 41.024000] Oops: 0000 [#1] > [ 41.024000] 8K_STACKS PREEMPT > [ 41.024000] last sysfs file: /devices/pci0000:00/0000:00:1d.7/usb5/5-0:1.0/bInterfaceProtocol > [ 41.024000] Modules linked in: snd_seq snd_seq_device ohci_hcd parport_pc parport pcspkr ipw2200 yenta_socket rsrc_nonstatic pcmcia_core snd_intel8x0 snd_ac97_codec snd_ac97_bus snd_pcm snd_timer snd soundcore snd_page_alloc ehci_hcd uhci_hcd usbcore cpufreq_stats cpufreq_powersave cpufreq_ondemand cpufreq_conservative speedstep_centrino freq_table processor ac battery i915 drm tg3 joydev tsdev > [ 41.024000] CPU: 0 > [ 41.024000] EIP: 0060:[] Not tainted VLI > [ 41.024000] EFLAGS: 00210246 (2.6.18-rc4-mm1-def01 #1) > [ 41.024000] EIP is at sysfs_lookup+0x65/0xb0 > [ 41.024000] eax: f3161e40 ebx: f316842c ecx: f73f6280 edx: f316842c > [ 41.024000] esi: 6e756f73 edi: f3161ec4 ebp: f6c35dfc esp: f6c35de0 > [ 41.024000] ds: 007b es: 007b ss: 0068 > [ 41.024000] Process modprobe (pid: 8952, ti=f6c34000 task=f7d17550 task.ti=f6c34000) > [ 41.024000] Stack: f316842c f3161e94 f31684bc 00000000 fffffff4 f73f72ec f3161e40 f6c35e1c > [ 41.024000] c0184d42 f73f72ec f3161e40 00000000 ffffffff c03a6656 12fd28db f6c35e4c > [ 41.024000] c0184e02 f6c35e30 f3161ee8 00000000 12fd28db 00000005 c03a6651 c038230e > [ 41.024000] Call Trace: > [ 41.024000] [] __lookup_hash+0x9d/0xcc > [ 41.024000] [] lookup_one_len+0x71/0x86 > [ 41.024000] [] create_dir+0x43/0x23f > [ 41.024000] [] sysfs_create_subdir+0x26/0x28 > [ 41.024000] [] sysfs_create_group+0x77/0x97 > [ 41.024000] [] dpm_sysfs_add+0x1e/0x20 > [ 41.024000] [] device_pm_add+0x64/0x89 > [ 41.024000] [] device_add+0x1d9/0x380 > [ 41.024000] [] device_register+0x1a/0x20 > [ 41.024000] [] device_create+0xaa/0xc4 > [ 41.024000] [] snd_register_device+0xcf/0x104 [snd] > [ 41.024000] [] snd_sequencer_device_init+0x4e/0x7c [snd_seq] > [ 41.024000] [] alsa_seq_init+0x2f/0x51 [snd_seq] > [ 41.024000] [] sys_init_module+0x163/0x221 > [ 41.024000] [] sysenter_past_esp+0x56/0x8d > [ 41.024000] [] 0xb7fb0410 > [ 41.024000] [] show_trace_log_lvl+0x2f/0x45 > [ 41.024000] [] show_stack_log_lvl+0x98/0xb2 > [ 41.024000] [] show_registers+0x1eb/0x289 > [ 41.024000] [] die+0x134/0x241 > [ 41.024000] [] do_page_fault+0x395/0x620 > [ 41.024000] [] error_code+0x39/0x40 > [ 41.024000] [] __lookup_hash+0x9d/0xcc > [ 41.024000] [] lookup_one_len+0x71/0x86 > [ 41.024000] [] create_dir+0x43/0x23f > [ 41.024000] [] sysfs_create_subdir+0x26/0x28 > [ 41.024000] [] sysfs_create_group+0x77/0x97 > [ 41.024000] [] dpm_sysfs_add+0x1e/0x20 > [ 41.024000] [] device_pm_add+0x64/0x89 > [ 41.024000] [] device_add+0x1d9/0x380 > [ 41.024000] [] device_register+0x1a/0x20 > [ 41.024000] [] device_create+0xaa/0xc4 > [ 41.024000] [] snd_register_device+0xcf/0x104 [snd] > [ 41.024000] [] snd_sequencer_device_init+0x4e/0x7c [snd_seq] > [ 41.024000] [] alsa_seq_init+0x2f/0x51 [snd_seq] > [ 41.024000] [] sys_init_module+0x163/0x221 > [ 41.024000] [] sysenter_past_esp+0x56/0x8d > [ 41.024000] ======================= > [ 41.024000] Code: 42 fc 89 c3 8b 40 04 0f 18 00 90 3b 55 ec 75 e6 8b 45 f0 83 c4 10 5b 5e 5f 5d c3 89 1c 24 e8 27 e9 ff ff 89 c6 8b 45 0c 8b 78 48 ae 75 08 84 c0 75 f8 31 c0 eb 04 19 c0 0c 01 85 c0 75 bd f6 > [ 41.024000] EIP: [] sysfs_lookup+0x65/0xb0 SS:ESP 0068:f6c35de0 > [ 41.024000] > > Hi Andrew, I think that this definitely qualifies as a drm bug. Here are the tests that I did and that make me think so: - Removing the line 'Load "dri"' from xorg.conf makes the oops disappear. - The bisection I performed indicates that the problem comes from the following set of patches: git-drm.patch drm-build-fix.patch drm-build-fixes-2.patch allow-drm-detection-of-new-via-chipsets.patch git-drm-build-fix.patch - Appliying the attached patch makes the oops disapear too. Now, I don't know the drm code, and I'm not able to explain why the fix works... Any ideas? Regards, Frederik Signed-off-by: Frederik Deweerdt diff --git a/drivers/char/drm/drm_lock.c b/drivers/char/drm/drm_lock.c index f9e4530..a9e01b7 100644 --- a/drivers/char/drm/drm_lock.c +++ b/drivers/char/drm/drm_lock.c @@ -65,12 +65,6 @@ int drm_lock(struct inode *inode, struct if (copy_from_user(&lock, (drm_lock_t __user *) arg, sizeof(lock))) return -EFAULT; - if (lock.context == DRM_KERNEL_CONTEXT) { - DRM_ERROR("Process %d using kernel context %d\n", - current->pid, lock.context); - return -EINVAL; - } - DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n", lock.context, current->pid, dev->lock.hw_lock->lock, lock.flags); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/