[Bug 103413] R9285 Xonotic gpu lock since radeonsi: split si_emit_shader_pointer

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103413

            Bug ID: 103413
           Summary: R9285 Xonotic gpu lock since radeonsi: split
                    si_emit_shader_pointer
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: adf.lists at gmail.com
        QA Contact: dri-devel at lists.freedesktop.org

R9285 Tonga, probably since

36626ff radeonsi: split si_emit_shader_pointer

Xonotic big-key-bench timedemo may provoke a display/gpu lockup.

On head it seemed easy to provoke: one,two or three runs.
Bisecting was harder as it took more hence the possibility that I am on a false
good.
Currently on commit before above and haven't locked so far, don't know if
that's luck yet.

Lock seems to be same(ish) place in demo = frame 6512, though once it was 6514.

Waiting before doing SysRq I will get a timeout trace as below. I tried on
older kernels with same result, the dirty here is just a CPU fix I need that's
in rc-5.

 INFO: task gallium_drv:0:985 blocked for more than 120 seconds.
       Not tainted 4.14.0-rc3-g96687ec-dirty #1
 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
 gallium_drv:0   D    0   985    962 0x00000000
 Call Trace:
  __schedule+0x2ce/0x890
  ? _raw_write_unlock+0x11/0x30
  schedule+0x3b/0x90
  amd_sched_entity_push_job+0x9f/0xf0 [amdgpu]
  ? remove_wait_queue+0x80/0x80
  amdgpu_job_submit+0x9a/0xc0 [amdgpu]
  amdgpu_vm_bo_update_mapping+0x2de/0x3a0 [amdgpu]
  ? amdgpu_vm_free_mapping.isra.20+0x30/0x30 [amdgpu]
  amdgpu_vm_bo_update+0x2e8/0x6a0 [amdgpu]
  amdgpu_gem_va_ioctl+0x476/0x480 [amdgpu]
  ? amdgpu_gem_metadata_ioctl+0x1d0/0x1d0 [amdgpu]
  drm_ioctl_kernel+0x6f/0xc0 [drm]
  drm_ioctl+0x2f9/0x3c0 [drm]
  ? futex_wake+0x7c/0x140
  ? amdgpu_gem_metadata_ioctl+0x1d0/0x1d0 [amdgpu]
  ? do_futex+0x289/0xb20
  ? put_prev_entity+0xf8/0x5a0
  ? preempt_count_add+0x99/0xb0
  ? _raw_write_unlock_irqrestore+0x13/0x30
  ? _raw_spin_unlock_irqrestore+0x9/0x10
  amdgpu_drm_ioctl+0x54/0x90 [amdgpu]
  do_vfs_ioctl+0x98/0x5b0
  ? __fget+0x6e/0xa0
  SyS_ioctl+0x47/0x80
  entry_SYSCALL_64_fastpath+0x17/0x98
 RIP: 0033:0x7fee63cb8717
 RSP: 002b:00007fee567415a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
 RAX: ffffffffffffffda RBX: 00007fee2c00bbe0 RCX: 00007fee63cb8717
 RDX: 00007fee567415f0 RSI: 00000000c0286448 RDI: 000000000000000e
 RBP: 0000000000000000 R08: 0000000150400000 R09: 000000000000000e
 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
 R13: 0000000000000000 R14: 000000000370e4a0 R15: 0000000008881590

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