From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753333AbZEXLP2 (ORCPT ); Sun, 24 May 2009 07:15:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752118AbZEXLPQ (ORCPT ); Sun, 24 May 2009 07:15:16 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:60469 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751520AbZEXLPO (ORCPT ); Sun, 24 May 2009 07:15:14 -0400 From: "Rafael J. Wysocki" To: Miles Lane Subject: Re: 2.6.30-rc7 - (&dev->mode_config.mutex){+.+.+.}, at: [] drm_mode_getresources+0x2f/0x54f - INFO: possible circular locking dependency detected Date: Sun, 24 May 2009 13:15:33 +0200 User-Agent: KMail/1.11.2 (Linux/2.6.30-rc6-rjw; KDE/4.2.3; x86_64; ; ) Cc: LKML , Jesse Barnes , DRI References: In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200905241315.34012.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org You should also CC this to dri-deve I think (added). On Sunday 24 May 2009, Miles Lane wrote: > [ 38.564164] [ INFO: possible circular locking dependency detected ] > [ 38.564167] 2.6.30-rc7 #2 > [ 38.564170] ------------------------------------------------------- > [ 38.564173] Xorg/3110 is trying to acquire lock: > [ 38.564176] (&mm->mmap_sem){++++++}, at: [] > might_fault+0x64/0xb8 > [ 38.564188] > [ 38.564189] but task is already holding lock: > [ 38.564192] (&dev->mode_config.mutex){+.+.+.}, at: > [] drm_mode_getresources+0x2f/0x54f > [ 38.564203] > [ 38.564204] which lock already depends on the new lock. > [ 38.564205] > [ 38.564208] > [ 38.564208] the existing dependency chain (in reverse order) is: > [ 38.564212] > [ 38.564212] -> #3 (&dev->mode_config.mutex){+.+.+.}: > [ 38.564219] [] __lock_acquire+0xa39/0xbc9 > [ 38.564226] [] lock_acquire+0xf4/0x118 > [ 38.564231] [] __mutex_lock_common+0x5a/0x40c > [ 38.564239] [] mutex_lock_nested+0x32/0x37 > [ 38.564244] [] intelfb_pan_display+0x86/0xf7 > [ 38.564251] [] fb_pan_display+0xca/0x111 > [ 38.564257] [] bit_update_start+0x1b/0x44 > [ 38.564262] [] fbcon_switch+0x3fb/0x400 > [ 38.564262] [] redraw_screen+0xc9/0x162 > [ 38.564262] [] fbcon_prepare_logo+0x24f/0x2e1 > [ 38.564262] [] fbcon_init+0x36c/0x3fc > [ 38.564262] [] visual_init+0x9a/0xd9 > [ 38.564262] [] bind_con_driver+0x183/0x2af > [ 38.564262] [] take_over_console+0x37/0x44 > [ 38.564262] [] fbcon_takeover+0x57/0x85 > [ 38.564262] [] fbcon_event_notify+0x319/0x677 > [ 38.564262] [] notifier_call_chain+0x63/0x97 > [ 38.564262] [] > __blocking_notifier_call_chain+0x4b/0x62 > [ 38.564262] [] blocking_notifier_call_chain+0xf/0x11 > [ 38.564262] [] fb_notifier_call_chain+0x16/0x18 > [ 38.564262] [] register_framebuffer+0x22a/0x23f > [ 38.564262] [] intelfb_probe+0x4ef/0x573 > [ 38.564262] [] drm_helper_initial_config+0x173/0x184 > [ 38.564262] [] i915_driver_load+0x8c7/0x929 > [ 38.564262] [] drm_get_dev+0x381/0x485 > [ 38.564262] [] i915_pci_probe+0x10/0x12 > [ 38.564262] [] local_pci_probe+0x12/0x16 > [ 38.564262] [] pci_device_probe+0x60/0x8f > [ 38.564262] [] driver_probe_device+0x9d/0x122 > [ 38.564262] [] __driver_attach+0x58/0x7c > [ 38.564262] [] bus_for_each_dev+0x54/0x89 > [ 38.564262] [] driver_attach+0x19/0x1b > [ 38.564262] [] bus_add_driver+0xae/0x1e7 > [ 38.564262] [] driver_register+0x98/0x105 > [ 38.564262] [] __pci_register_driver+0x63/0xd3 > [ 38.564262] [] drm_init+0x68/0xce > [ 38.564262] [] i915_init+0x4b/0x4d > [ 38.564262] [] do_one_initcall+0x65/0x153 > [ 38.564262] [] kernel_init+0x14e/0x1a4 > [ 38.564262] [] child_rip+0xa/0x20 > [ 38.564262] [] 0xffffffffffffffff > [ 38.564262] > [ 38.564262] -> #2 ((fb_notifier_list).rwsem){.+.+.+}: > [ 38.564262] [] __lock_acquire+0xa39/0xbc9 > [ 38.564262] [] lock_acquire+0xf4/0x118 > [ 38.564262] [] down_read+0x40/0x4f > [ 38.564262] [] > __blocking_notifier_call_chain+0x34/0x62 > [ 38.564262] [] blocking_notifier_call_chain+0xf/0x11 > [ 38.564262] [] fb_notifier_call_chain+0x16/0x18 > [ 38.564262] [] register_framebuffer+0x22a/0x23f > [ 38.564262] [] intelfb_probe+0x4ef/0x573 > [ 38.564262] [] drm_helper_initial_config+0x173/0x184 > [ 38.564262] [] i915_driver_load+0x8c7/0x929 > [ 38.564262] [] drm_get_dev+0x381/0x485 > [ 38.564262] [] i915_pci_probe+0x10/0x12 > [ 38.564262] [] local_pci_probe+0x12/0x16 > [ 38.564262] [] pci_device_probe+0x60/0x8f > [ 38.564262] [] driver_probe_device+0x9d/0x122 > [ 38.564262] [] __driver_attach+0x58/0x7c > [ 38.564262] [] bus_for_each_dev+0x54/0x89 > [ 38.564262] [] driver_attach+0x19/0x1b > [ 38.564262] [] bus_add_driver+0xae/0x1e7 > [ 38.564262] [] driver_register+0x98/0x105 > [ 38.564262] [] __pci_register_driver+0x63/0xd3 > [ 38.564262] [] drm_init+0x68/0xce > [ 38.564262] [] i915_init+0x4b/0x4d > [ 38.564262] [] do_one_initcall+0x65/0x153 > [ 38.564262] [] kernel_init+0x14e/0x1a4 > [ 38.564262] [] child_rip+0xa/0x20 > [ 38.564262] [] 0xffffffffffffffff > [ 38.564262] > [ 38.564262] -> #1 (&fb_info->lock){+.+.+.}: > [ 38.564262] [] __lock_acquire+0xa39/0xbc9 > [ 38.564262] [] lock_acquire+0xf4/0x118 > [ 38.564262] [] __mutex_lock_common+0x5a/0x40c > [ 38.564262] [] mutex_lock_nested+0x32/0x37 > [ 38.564262] [] fb_mmap+0xa1/0x190 > [ 38.564262] [] mmap_region+0x2a7/0x483 > [ 38.564262] [] do_mmap_pgoff+0x2f7/0x35a > [ 38.564262] [] sys_mmap+0x97/0xd8 > [ 38.564262] [] system_call_fastpath+0x16/0x1b > [ 38.564262] [] 0xffffffffffffffff > [ 38.564262] > [ 38.564262] -> #0 (&mm->mmap_sem){++++++}: > [ 38.564262] [] __lock_acquire+0x916/0xbc9 > [ 38.564262] [] lock_acquire+0xf4/0x118 > [ 38.564262] [] might_fault+0x91/0xb8 > [ 38.564262] [] drm_mode_getresources+0x289/0x54f > [ 38.564262] [] drm_ioctl+0x21e/0x2ec > [ 38.564262] [] vfs_ioctl+0x6a/0x82 > [ 38.564262] [] do_vfs_ioctl+0x463/0x4a4 > [ 38.564262] [] sys_ioctl+0x51/0x74 > [ 38.564262] [] system_call_fastpath+0x16/0x1b > [ 38.564262] [] 0xffffffffffffffff > [ 38.564262] > [ 38.564262] other info that might help us debug this: > [ 38.564262] > [ 38.564262] 1 lock held by Xorg/3110: > [ 38.564262] #0: (&dev->mode_config.mutex){+.+.+.}, at: > [] drm_mode_getresources+0x2f/0x54f > [ 38.564262] > [ 38.564262] stack backtrace: > [ 38.564262] Pid: 3110, comm: Xorg Not tainted 2.6.30-rc7 #2 > [ 38.564262] Call Trace: > [ 38.564262] [] print_circular_bug_tail+0x71/0x7c > [ 38.564262] [] __lock_acquire+0x916/0xbc9 > [ 38.564262] [] ? might_fault+0x64/0xb8 > [ 38.564262] [] lock_acquire+0xf4/0x118 > [ 38.564262] [] ? might_fault+0x64/0xb8 > [ 38.564262] [] might_fault+0x91/0xb8 > [ 38.564262] [] ? might_fault+0x64/0xb8 > [ 38.564262] [] drm_mode_getresources+0x289/0x54f > [ 38.564262] [] ? __rcu_read_lock+0x0/0x3a > [ 38.564262] [] ? drm_mode_getresources+0x0/0x54f > [ 38.564262] [] drm_ioctl+0x21e/0x2ec > [ 38.564262] [] vfs_ioctl+0x6a/0x82 > [ 38.564262] [] do_vfs_ioctl+0x463/0x4a4 > [ 38.564262] [] sys_ioctl+0x51/0x74 > [ 38.564262] [] system_call_fastpath+0x16/0x1b