From: Bob C. <me...@bo...> - 2009-01-30 19:42:22
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On Tue, Jan 13, 2009 at 6:17 PM, Brandeburg, Jesse <jes...@in...> wrote: > [drm] Initialized i915 1.6.0 20080730 on minor 0 > > ======================================================= > [ INFO: possible circular locking dependency detected ] > 2.6.29-rc1 #1 > ------------------------------------------------------- Same here, this happens every time I start X, still in -rc3. I can test any patches. This is Fedora 10. ======================================================= [ INFO: possible circular locking dependency detected ] 2.6.29-rc3 #45 ------------------------------------------------------- Xorg/3108 is trying to acquire lock: (&mm->mmap_sem){----}, at: [<c016a148>] might_fault+0x48/0x84 but task is already holding lock: (&dev->struct_mutex){--..}, at: [<f82ded8c>] i915_gem_execbuffer+0x124/0xa48 [i915] which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&dev->struct_mutex){--..}: [<c0140197>] __lock_acquire+0xfb9/0x12d3 [<f82bdd47>] drm_vm_open+0x22/0x32 [drm] [<f82bdd47>] drm_vm_open+0x22/0x32 [drm] [<c01404fa>] lock_acquire+0x49/0x61 [<f82bdd47>] drm_vm_open+0x22/0x32 [drm] [<c031300b>] mutex_lock_nested+0xe6/0x27d [<f82bdd47>] drm_vm_open+0x22/0x32 [drm] [<f82bdd47>] drm_vm_open+0x22/0x32 [drm] [<f82bdd47>] drm_vm_open+0x22/0x32 [drm] [<c012117c>] dup_mm+0x26d/0x31c [<c0121bd1>] copy_process+0x983/0xfaf [<c012b314>] do_sigaction+0x6a/0x13d [<c0122315>] do_fork+0x118/0x2a6 [<c012b489>] sys_rt_sigaction+0x66/0x79 [<c0102e77>] sysenter_exit+0xf/0x18 [<c010165a>] sys_clone+0x22/0x26 [<c0102e45>] sysenter_do_call+0x12/0x35 [<ffffffff>] 0xffffffff -> #1 (&mm->mmap_sem/1){--..}: [<c0140197>] __lock_acquire+0xfb9/0x12d3 [<c0120fba>] dup_mm+0xab/0x31c [<c0120fba>] dup_mm+0xab/0x31c [<c01404fa>] lock_acquire+0x49/0x61 [<c0120fba>] dup_mm+0xab/0x31c [<c0135605>] down_write_nested+0x2b/0x45 [<c0120fba>] dup_mm+0xab/0x31c [<c0120fba>] dup_mm+0xab/0x31c [<c0121b2c>] copy_process+0x8de/0xfaf [<c0121bd1>] copy_process+0x983/0xfaf [<c0122315>] do_fork+0x118/0x2a6 [<c01f4eaf>] copy_to_user+0x29/0xf8 [<c0102e77>] sysenter_exit+0xf/0x18 [<c010165a>] sys_clone+0x22/0x26 [<c0102e45>] sysenter_do_call+0x12/0x35 [<ffffffff>] 0xffffffff -> #0 (&mm->mmap_sem){----}: [<c013fec7>] __lock_acquire+0xce9/0x12d3 [<c0314559>] _spin_unlock+0x25/0x3a [<c01404fa>] lock_acquire+0x49/0x61 [<c016a148>] might_fault+0x48/0x84 [<c016a165>] might_fault+0x65/0x84 [<c016a148>] might_fault+0x48/0x84 [<c01f4eaf>] copy_to_user+0x29/0xf8 [<f82df5ec>] i915_gem_execbuffer+0x984/0xa48 [i915] [<c016a148>] might_fault+0x48/0x84 [<f82b951a>] drm_ioctl+0x1a9/0x221 [drm] [<f82dec68>] i915_gem_execbuffer+0x0/0xa48 [i915] [<c0186102>] vfs_ioctl+0x49/0x5f [<c0186656>] do_vfs_ioctl+0x46c/0x4a7 [<c03144c8>] _spin_unlock_irq+0x2b/0x40 [<c0125cd9>] do_setitimer+0x15d/0x2af [<c0125e70>] sys_setitimer+0x45/0x6f [<c01866bd>] sys_ioctl+0x2c/0x42 [<c0102e45>] sysenter_do_call+0x12/0x35 [<ffffffff>] 0xffffffff other info that might help us debug this: 1 lock held by Xorg/3108: #0: (&dev->struct_mutex){--..}, at: [<f82ded8c>] i915_gem_execbuffer+0x124/0xa48 [i915] stack backtrace: Pid: 3108, comm: Xorg Not tainted 2.6.29-rc3 #45 Call Trace: [<c013eeb5>] print_circular_bug_tail+0xa4/0xae [<c013fec7>] __lock_acquire+0xce9/0x12d3 [<c0314559>] _spin_unlock+0x25/0x3a [<c01404fa>] lock_acquire+0x49/0x61 [<c016a148>] might_fault+0x48/0x84 [<c016a165>] might_fault+0x65/0x84 [<c016a148>] might_fault+0x48/0x84 [<c01f4eaf>] copy_to_user+0x29/0xf8 [<f82df5ec>] i915_gem_execbuffer+0x984/0xa48 [i915] [<c016a148>] might_fault+0x48/0x84 [<f82b951a>] drm_ioctl+0x1a9/0x221 [drm] [<f82dec68>] i915_gem_execbuffer+0x0/0xa48 [i915] [<c0186102>] vfs_ioctl+0x49/0x5f [<c0186656>] do_vfs_ioctl+0x46c/0x4a7 [<c03144c8>] _spin_unlock_irq+0x2b/0x40 [<c0125cd9>] do_setitimer+0x15d/0x2af [<c0125e70>] sys_setitimer+0x45/0x6f [<c01866bd>] sys_ioctl+0x2c/0x42 [<c0102e45>] sysenter_do_call+0x12/0x35 -- Bob Copeland %% www.bobcopeland.com |