=============================================
[ INFO: possible recursive locking detected ]
2.6.24-0.123.rc6.fc9 #1
---------------------------------------------
glxgears/2563 is trying to acquire lock:
(&bo->mutex){--..}, at: [<f8b42838>] drm_bo_mem_space+0x27a/0x356 [drm]
but task is already holding lock:
(&bo->mutex){--..}, at: [<f8b42dff>] drm_bo_do_validate+0x26/0x9c [drm]
other info that might help us debug this:
3 locks held by glxgears/2563:
]
#0: (&dev_priv->cmdbuf_mutex){--..}, at: [<f8dfcaa2>]
i915_execbuffer+0x104/0
#1: (&bo->mutex){--..}, at: [<f8b42dff>] drm_bo_do_validate+0x26/0x9c
[drm] ]
#2: (&dev->bm.evict_mutex){--..}, at: [<f8b42986>]
drm_bo_move_buffer+0x72/0x
stack backtrace:
Pid: 10655, comm: glxgears Not tainted 2.6.24-0.123.rc6.fc9 #1
[<c040649a>] show_trace_log_lvl+0x1a/0x2f
[<c0406d55>] show_trace+0x12/0x14
[<c0407075>] dump_stack+0x6c/0x72
[<c044cee3>] __lock_acquire+0x815/0xb5f
[<c044d625>] lock_acquire+0x7b/0x9e
[<c063cd1b>] mutex_lock_nested+0xec/0x282
[<f9016838>] drm_bo_mem_space+0x27a/0x356 [drm]
[<f90169bc>] drm_bo_move_buffer+0xa8/0x17b [drm]
[<f9016c27>] drm_buffer_object_validate+0x198/0x34a [drm]
[<f9016e50>] drm_bo_do_validate+0x77/0x9c [drm]
[<f9016f0f>] drm_bo_handle_validate+0x9a/0xc2 [drm]
[<f8b4c898>] i915_validate_buffer_list+0x24f/0x36d [i915]
[<f8b4db18>] i915_execbuffer+0x17a/0x356 [i915]
[<f900c457>] drm_unlocked_ioctl+0x1d3/0x257 [drm]
[<f900c4ea>] drm_ioctl+0xf/0x11 [drm]
[<c049ce94>] do_ioctl+0x50/0x67
[<c049d0f4>] vfs_ioctl+0x249/0x25c
[<c049d149>] sys_ioctl+0x42/0x5d
[<c0405252>] syscall_call+0x7/0xb
it looks like we can get into drm_bo_mem_force_space, while holding a
bo->mutex, then it might be possible to iterate the lru and find the
current bo and lock it again.. now something else might stop this but the
lockdep may need to be thought about it..
Dave.
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