Nov 25 09:44:44 ph4 kernel: INFO: rcu_preempt detected stalls on CPUs/tasks:
Nov 25 09:44:44 ph4 kernel:     3-...: (1 GPs behind) idle=901/140000000000000/0 softirq=88624/88625 fqs=19996 
Nov 25 09:44:44 ph4 kernel:     (detected by 0, t=60002 jiffies, g=41172, c=41171, q=345)
Nov 25 09:44:44 ph4 kernel: Task dump for CPU 3:
Nov 25 09:44:44 ph4 kernel: X               R  running task        0   472    471 0x0000000c
Nov 25 09:44:44 ph4 kernel: ffffffff8155aad4 ffff8802333810c8 ffff8802328ab580 ffff8800bac9d040
Nov 25 09:44:44 ph4 kernel: ffffea0002bd1880 ffffe8ffffd80ce0 ffff8800bd03c000 ffff8802333810c0
Nov 25 09:44:44 ph4 kernel: ffff8802105dc780 ffff88023fd95dc0 0000000000000000 ffff8800bd03bb70
Nov 25 09:44:44 ph4 kernel: Call Trace:
Nov 25 09:44:44 ph4 kernel: [<ffffffff8155aad4>] ? __schedule+0x364/0xb50
Nov 25 09:44:44 ph4 kernel: [<ffffffff812bdae7>] ? debug_smp_processor_id+0x17/0x20
Nov 25 09:44:44 ph4 kernel: [<ffffffff81096240>] ? queued_spin_lock_slowpath+0x70/0x180
Nov 25 09:44:44 ph4 kernel: [<ffffffff8155f027>] ? _raw_spin_lock_irqsave+0x47/0x60
Nov 25 09:44:44 ph4 kernel: [<ffffffff8108f805>] ? __wake_up+0x25/0x60
Nov 25 09:44:44 ph4 kernel: [<ffffffffa038d1c6>] ? amd_sched_entity_in+0x96/0xa0 [amdgpu]
Nov 25 09:44:44 ph4 kernel: [<ffffffffa038dc27>] ? amd_sched_entity_push_job+0x17/0xd0 [amdgpu]
Nov 25 09:44:44 ph4 kernel: [<ffffffffa03220fa>] ? amdgpu_cs_ioctl+0xa0a/0xc00 [amdgpu]
Nov 25 09:44:44 ph4 kernel: [<ffffffffa0203fb2>] ? drm_ioctl+0x152/0x590 [drm]
Nov 25 09:44:44 ph4 kernel: [<ffffffffa03216f0>] ? amdgpu_cs_find_mapping+0x80/0x80 [amdgpu]
Nov 25 09:44:44 ph4 kernel: [<ffffffff8107c3ad>] ? get_parent_ip+0xd/0x50
Nov 25 09:44:44 ph4 kernel: [<ffffffff8107c439>] ? preempt_count_add+0x49/0xa0
Nov 25 09:44:44 ph4 kernel: [<ffffffff8155edb3>] ? _raw_spin_unlock_irqrestore+0x13/0x30
Nov 25 09:44:44 ph4 kernel: [<ffffffffa0309054>] ? amdgpu_drm_ioctl+0x54/0x90 [amdgpu]
Nov 25 09:44:44 ph4 kernel: [<ffffffff8118b07d>] ? do_vfs_ioctl+0x2cd/0x4a0
Nov 25 09:44:44 ph4 kernel: [<ffffffff81492304>] ? __sys_recvmsg+0x44/0x80
Nov 25 09:44:44 ph4 kernel: [<ffffffff8118b297>] ? SyS_ioctl+0x47/0x80
Nov 25 09:44:44 ph4 kernel: [<ffffffff8155f45b>] ? entry_SYSCALL_64_fastpath+0x16/0x6e