Hello,
kernel 4.4.2 (dirty - not committed 4.4.2 patch); Radeon RV730, Xorg 1.18.0, mesa 1.11.1, full dmesg attached
CONFIG_DRM=y CONFIG_DRM_KMS_HELPER=y CONFIG_DRM_KMS_FB_HELPER=y CONFIG_DRM_FBDEV_EMULATION=y CONFIG_DRM_TTM=m CONFIG_DRM_RADEON=m CONFIG_DRM_BRIDGE=y
INFO: task kworker/u8:8:719 blocked for more than 120 seconds. Not tainted 4.4.2-dirty #33 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u8:8 D ffff8800db2f3b48 0 719 2 0x00000000 Workqueue: radeon-crtc radeon_flip_work_func [radeon] ffff8800db2f3b48 ffff8801592ada00 ffff8800dad577c0 0000000000000212 ffff8800db2f4000 ffff8800db2f3c48 ffff8800d8514000 ffff8800d8515360 7fffffffffffffff ffff8800db2f3b60 ffffffff8150b337 ffff8800db2f3be8 Call Trace: [<ffffffff8150b337>] schedule+0x37/0x80 [<ffffffff8150d8d0>] schedule_timeout+0x140/0x1b0 [<ffffffffa003762d>] ? radeon_fence_process+0xd/0x30 [radeon] [<ffffffffa0037688>] ? radeon_fence_any_seq_signaled+0x38/0x70 [radeon] [<ffffffffa0037875>] radeon_fence_wait_seq_timeout.constprop.13+0x1b5/0x220 [radeon] [<ffffffff81072b70>] ? wait_woken+0x80/0x80 [<ffffffffa0037a6e>] radeon_fence_wait+0x7e/0xb0 [radeon] [<ffffffffa00fb79a>] uvd_v1_0_ib_test+0xfa/0x150 [radeon] [<ffffffffa00ef493>] radeon_ib_ring_tests+0x53/0xc0 [radeon] [<ffffffffa001fa27>] radeon_gpu_reset+0x217/0x310 [radeon] [<ffffffffa0047b53>] radeon_flip_work_func+0x233/0x250 [radeon] [<ffffffff8105e672>] ? finish_task_switch+0x72/0x1c0 [<ffffffff81055d4f>] process_one_work+0x12f/0x320 [<ffffffff81055f86>] worker_thread+0x46/0x440 [<ffffffff81055f40>] ? process_one_work+0x320/0x320 [<ffffffff8105ad04>] kthread+0xc4/0xe0 [<ffffffff8105ac40>] ? kthread_create_on_node+0x170/0x170 [<ffffffff8150e99f>] ret_from_fork+0x3f/0x70 [<ffffffff8105ac40>] ? kthread_create_on_node+0x170/0x170 INFO: task X:2134 blocked for more than 120 seconds. Not tainted 4.4.2-dirty #33 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. X D ffff880157077bb8 0 2134 2133 0x00000004 ffff880157077bb8 ffff8800db9a4600 ffff8801592ada00 ffff8800d8514018 ffff880157078000 ffff8800d8514030 ffff8800d8514018 ffffffff00000000 fffffffe00000001 ffff880157077bd0 ffffffff8150b337 ffff8800db9a4600 Call Trace: [<ffffffff8150b337>] schedule+0x37/0x80 [<ffffffff8150d53c>] rwsem_down_write_failed+0x13c/0x330 [<ffffffff81294323>] call_rwsem_down_write_failed+0x13/0x20 [<ffffffff8150cd7f>] ? down_write+0x1f/0x30 [<ffffffffa001f837>] radeon_gpu_reset+0x27/0x310 [radeon] [<ffffffffa0036f30>] ? radeon_fence_default_wait+0x130/0x130 [radeon] [<ffffffff8138403e>] ? fence_wait_timeout+0x4e/0x90 [<ffffffff81384cc7>] ? reservation_object_wait_timeout_rcu+0x1f7/0x2b0 [<ffffffffa004c5e9>] radeon_gem_handle_lockup.part.4+0x9/0x20 [radeon] [<ffffffffa004d332>] radeon_gem_wait_idle_ioctl+0xc2/0x110 [radeon] [<ffffffff813567ed>] drm_ioctl+0x13d/0x560 [<ffffffff8104e584>] ? __set_current_blocked+0x44/0x50 [<ffffffffa004d270>] ? radeon_gem_busy_ioctl+0xc0/0xc0 [radeon] [<ffffffff8100c963>] ? fpu__activate_curr+0x33/0x70 [<ffffffff8100d6dc>] ? __fpu__restore_sig+0x6c/0x460 [<ffffffffa001d009>] radeon_drm_ioctl+0x9/0x10 [radeon] [<ffffffff81116635>] do_vfs_ioctl+0x2b5/0x490 [<ffffffff8111f922>] ? __fget+0x72/0xa0 [<ffffffff8111684c>] SyS_ioctl+0x3c/0x70 [<ffffffff8150e657>] entry_SYSCALL_64_fastpath+0x12/0x6a INFO: task aces:31444 blocked for more than 120 seconds. Not tainted 4.4.2-dirty #33 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. aces D ffff8800d75e3a68 0 31444 1 0x00000000 ffff8800d75e3a68 ffff8800b5903c00 0000000000000000 ffff880100722f48 ffff8800d75e4000 ffff8800d8514018 ffff8800d8514030 ffff8800d75e3de8 0000000000000066 ffff8800d75e3a80 ffffffff8150b337 ffff8800b5903c00 Call Trace: [<ffffffff8150b337>] schedule+0x37/0x80 [<ffffffff8150d3be>] rwsem_down_read_failed+0xde/0x120 [<ffffffff812942f4>] call_rwsem_down_read_failed+0x14/0x30 [<ffffffff8150cd52>] ? down_read+0x12/0x20 [<ffffffffa004fbfa>] radeon_cs_ioctl+0x2a/0x740 [radeon] [<ffffffff8106608b>] ? update_cfs_shares+0xab/0xd0 [<ffffffff81069078>] ? dequeue_task_fair+0x5c8/0xfe0 [<ffffffff8106d8cd>] ? pick_next_task_fair+0x15d/0x450 [<ffffffff8105e672>] ? finish_task_switch+0x72/0x1c0 [<ffffffff8150ad5c>] ? __schedule+0x25c/0x800 [<ffffffff8150b337>] ? schedule+0x37/0x80 [<ffffffff81094e5b>] ? futex_wait_queue_me+0xab/0xe0 [<ffffffff81095ad5>] ? futex_wait+0x225/0x240 [<ffffffff8106040f>] ? check_preempt_curr+0x4f/0x90 [<ffffffff810955ad>] ? get_futex_key+0x21d/0x280 [<ffffffff813567ed>] drm_ioctl+0x13d/0x560 [<ffffffffa004fbd0>] ? radeon_cs_parser_init+0x490/0x490 [radeon] [<ffffffffa001d009>] radeon_drm_ioctl+0x9/0x10 [radeon] [<ffffffff81116635>] do_vfs_ioctl+0x2b5/0x490 [<ffffffff8111f922>] ? __fget+0x72/0xa0 [<ffffffff8111684c>] SyS_ioctl+0x3c/0x70 [<ffffffff8150e657>] entry_SYSCALL_64_fastpath+0x12/0x6a