From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753586AbZEXEk5 (ORCPT ); Sun, 24 May 2009 00:40:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751020AbZEXEku (ORCPT ); Sun, 24 May 2009 00:40:50 -0400 Received: from yx-out-2324.google.com ([74.125.44.29]:27842 "EHLO yx-out-2324.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750864AbZEXEkt (ORCPT ); Sun, 24 May 2009 00:40:49 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type :content-transfer-encoding; b=VcjfnFB6Cb6onWHafyVUDzmBgSFhqpUNGJlAWExBltKRz+MTAexu4FYkPoLQ5IF8Jk w32l99S4b9P8tivZ0n7NwETtg8xvZ/dF9Ezdb02IueTqEZmKknz4uK/5KIx76v90T8Lu llpziLQEp1QOq2F3SQLmOdEizCXcWFpVV4XxY= MIME-Version: 1.0 Date: Sun, 24 May 2009 00:40:50 -0400 Message-ID: Subject: 2.6.30-rc7 - (&dev->mode_config.mutex){+.+.+.}, at: [] drm_mode_getresources+0x2f/0x54f - INFO: possible circular locking dependency detected From: Miles Lane To: "Rafael J. Wysocki" , LKML , Jesse Barnes Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [ 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