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Re: xsrc/58133: X server crashes; radeon 5450; modesetting



I had a bit more success when dtrace's output was redirected to a file.
Here is the output from the last ttm_bo_uvm_fault() and the mmap()
before it. Before that there were several ttm_bo_uvm_fault() but no
preceeding mmap().

At first sight I notice that the number of calls/returns traced inside
ttm_bo_uvm_fault() is much larger than the cases where it didn't SEGV
afterwards (an example is shown in my previous mail).

  0    754                       mmap:entry   2812 X            -WR  ----S 0        512      17
  0  15167                ktr_syscall:entry 
  0  15168               ktr_syscall:return 
  0  26698               trace_enter:return 
  0  26017                   sys_mmap:entry 
  0   9797                 fd_getfile:entry 
  0   9798                fd_getfile:return 
  0  35449               drm_fop_mmap:entry 
  0  26783         ttm_bo_mmap_object:entry 
  0   8934 drm_vma_offset_lookup_locked:entry 
  0  23278      rb_tree_find_node_leq:entry 
  0  23279     rb_tree_find_node_leq:return 
  0   8935 drm_vma_offset_lookup_locked:return 
  0   8926 drm_vma_node_verify_access:entry 
  0  23274          rb_tree_find_node:entry 
  0  23275         rb_tree_find_node:return 
  0   8927 drm_vma_node_verify_access:return 
  0  26784        ttm_bo_mmap_object:return 
  0  35450              drm_fop_mmap:return 
  0  20609              pax_aslr_mmap:entry 
  0  20610             pax_aslr_mmap:return 
  0  52803            uvm_mmap.part.0:entry 
  0  27913                    uvm_map:entry 
  0  27939            uvm_map_prepare:entry 
  0  27927          uvm_map_findspace:entry 
  0  27928         uvm_map_findspace:return 
  0  27940           uvm_map_prepare:return 
  0  27923              uvm_map_enter:entry 
  0  21171       pool_cache_get_paddr:entry 
  0  21172      pool_cache_get_paddr:return 
  0  52816              uvm_rb_insert:entry 
  0  23280        rb_tree_insert_node:entry 
  0  23281       rb_tree_insert_node:return 
  0  27924             uvm_map_enter:return 
  0  27914                   uvm_map:return 
  0  52804           uvm_mmap.part.0:return 
  0   9822                fd_putvnode:entry 
  0   9823               fd_putvnode:return 
  0  26018                  sys_mmap:return 
  0  26699                 trace_exit:entry 
  0    755                      mmap:return return: 7f7ff1180000
  0  26805           ttm_bo_uvm_fault:entry ttm_bo_uvm_fault(ufi=ffffba886c0bbd60, vaddr=7f7ff1180000, pps=ffffba886c0bbe50, npages=1, centeridx=0, access_type=2, flags=42)
ufi->orig_map=ffff9db1cbcf1190, orig_rvaddr=7f7ff1180000, orig_size=1000, map=ffff9db1cbcf1190, mapv=5743, entry=ffff9db1d0ae5340, size=1000
*pps=0

  0  15795     linux_dma_resv_trylock:entry 
  0  16082     linux_ww_mutex_trylock:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  16992          mutex_vector_exit:entry 
  0  16083    linux_ww_mutex_trylock:return 
  0  15796    linux_dma_resv_trylock:return 
  0  22684 radeon_bo_fault_reserve_notify:entry 
  0  22680     radeon_bo_check_tiling:entry 
  0  22681    radeon_bo_check_tiling:return 
  0  26807            ttm_bo_validate:entry 
  0  26779          ttm_bo_mem_compat:entry 
  0  26780         ttm_bo_mem_compat:return 
  0  26781           ttm_bo_mem_space:entry 
  0  15791 linux_dma_resv_reserve_shared:entry 
  0  15792 linux_dma_resv_reserve_shared:return 
  0  50828 ttm_bo_mem_placement.constprop.0.isra.0:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  50808        ttm_bo_del_from_lru:entry 
  0  50809       ttm_bo_del_from_lru:return 
  0  50800      ttm_bo_add_mem_to_lru:entry 
  0  50801     ttm_bo_add_mem_to_lru:return 
  0  16992          mutex_vector_exit:entry 
  0  50829 ttm_bo_mem_placement.constprop.0.isra.0:return 
  0  50820        ttm_bo_man_get_node:entry 
  0  15045           kmem_intr_zalloc:entry 
  0  15042            kmem_intr_alloc:entry 
  0  21171       pool_cache_get_paddr:entry 
  0  21172      pool_cache_get_paddr:return 
  0  15043           kmem_intr_alloc:return 
  0  15046          kmem_intr_zalloc:return 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0   8571 drm_mm_insert_node_in_range:entry 
  0  23278      rb_tree_find_node_leq:entry 
  0  23279     rb_tree_find_node_leq:return 
  0  47466                    rm_hole:entry 
  0  23282        rb_tree_remove_node:entry 
  0  47105  rb_tree_removal_rebalance:entry 
  0  47106 rb_tree_removal_rebalance:return 
  0  47105  rb_tree_removal_rebalance:entry 
  0  47467                   rm_hole:return 
  0  23280        rb_tree_insert_node:entry 
  0  23281       rb_tree_insert_node:return 
  0  23280        rb_tree_insert_node:entry 
  0  23281       rb_tree_insert_node:return 
  0   8572 drm_mm_insert_node_in_range:return 
  0  16992          mutex_vector_exit:entry 
  0  50821       ttm_bo_man_get_node:return 
  0  50802 ttm_bo_add_move_fence.constprop.0:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  15739        linux_dma_fence_get:entry 
  0  15740       linux_dma_fence_get:return 
  0  16992          mutex_vector_exit:entry 
  0  50803 ttm_bo_add_move_fence.constprop.0:return 
  0  26782          ttm_bo_mem_space:return 
  0  50817     ttm_bo_handle_move_mem:entry 
  0  26804 ttm_bo_unmap_virtual_locked:entry 
  0  22700      radeon_bo_move_notify:entry 
  0  22680     radeon_bo_check_tiling:entry 
  0  22681    radeon_bo_check_tiling:return 
  0  23173    radeon_vm_bo_invalidate:entry 
  0  23174   radeon_vm_bo_invalidate:return 
  0  46596             radeon_bo_move:entry 
  0  26809                ttm_bo_wait:entry 
  0  15797 linux_dma_resv_wait_timeout_rcu:entry 
  0  15798 linux_dma_resv_wait_timeout_rcu:return 
  0  15773 linux_dma_resv_add_excl_fence:entry 
  0  15774 linux_dma_resv_add_excl_fence:return 
  0  26810               ttm_bo_wait:return 
  0  46781 radeon_move_blit.constprop.0.isra.0:entry 
  0   9441         evergreen_copy_dma:entry 
  0  23058           radeon_ring_lock:entry 
  0  23047          radeon_ring_alloc:entry 
  0  23054      radeon_ring_free_size:entry 
  0  23055     radeon_ring_free_size:return 
  0  23048         radeon_ring_alloc:return 
  0  23059          radeon_ring_lock:return 
  0  23100           radeon_sync_resv:entry 
  0  23101          radeon_sync_resv:return 
  0  23102          radeon_sync_rings:entry 
  0  23103         radeon_sync_rings:return 
  0  22855          radeon_fence_emit:entry 
  0  15042            kmem_intr_alloc:entry 
  0  21171       pool_cache_get_paddr:entry 
  0  21172      pool_cache_get_paddr:return 
  0  15043           kmem_intr_alloc:return 
  0  15749       linux_dma_fence_init:entry 
  0  15750      linux_dma_fence_init:return 
  0   9449 evergreen_dma_fence_ring_emit:entry 
  0   9450 evergreen_dma_fence_ring_emit:return 
  0  15981   linux_queue_delayed_work:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  30419               acquire_work:entry 
  0  30420              acquire_work:return 
  0  16992          mutex_vector_exit:entry 
  0  15982  linux_queue_delayed_work:return 
  0  22856         radeon_fence_emit:return 
  0  23066  radeon_ring_unlock_commit:entry 
  0  23051         radeon_ring_commit:entry 
  0  23098           radeon_sync_free:entry 
  0  23090      radeon_semaphore_free:entry 
  0  23091     radeon_semaphore_free:return 
  0  23090      radeon_semaphore_free:entry 
  0  23091     radeon_semaphore_free:return 
  0  23090      radeon_semaphore_free:entry 
  0  23091     radeon_semaphore_free:return 
  0  23090      radeon_semaphore_free:entry 
  0  23091     radeon_semaphore_free:return 
  0  23099          radeon_sync_free:return 
  0   9442        evergreen_copy_dma:return 
  0  26785  ttm_bo_move_accel_cleanup:entry 
  0  15773 linux_dma_resv_add_excl_fence:entry 
  0  15739        linux_dma_fence_get:entry 
  0  15740       linux_dma_fence_get:return 
  0  15774 linux_dma_resv_add_excl_fence:return 
  0  15754       linux_dma_fence_put:return 
  0  15739        linux_dma_fence_get:entry 
  0  15740       linux_dma_fence_get:return 
  0  50833 ttm_buffer_object_transfer:entry 
  0  15042            kmem_intr_alloc:entry 
  0  21171       pool_cache_get_paddr:entry 
  0  21172      pool_cache_get_paddr:return 
  0  15043           kmem_intr_alloc:return 
  0   8922          drm_vma_node_init:entry 
  0  27966               uvm_obj_init:entry 
  0  24392               rw_obj_alloc:entry 
  0  21171       pool_cache_get_paddr:entry 
  0  21172      pool_cache_get_paddr:return 
  0  24393              rw_obj_alloc:return 
  0  27971            uvm_obj_setlock:entry 
  0  24394                rw_obj_free:entry 
  0  21176       pool_cache_put_paddr:entry 
  0  24395               rw_obj_free:return 
  0  27972           uvm_obj_setlock:return 
  0  15786        linux_dma_resv_init:entry 
  0  16070        linux_ww_mutex_init:entry 
  0  15787       linux_dma_resv_init:return 
  0  15795     linux_dma_resv_trylock:entry 
  0  16082     linux_ww_mutex_trylock:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  16992          mutex_vector_exit:entry 
  0  16083    linux_ww_mutex_trylock:return 
  0  15796    linux_dma_resv_trylock:return 
  0  50834 ttm_buffer_object_transfer:return 
  0  15773 linux_dma_resv_add_excl_fence:entry 
  0  15739        linux_dma_fence_get:entry 
  0  15740       linux_dma_fence_get:return 
  0  15774 linux_dma_resv_add_excl_fence:return 
  0  16084      linux_ww_mutex_unlock:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  16992          mutex_vector_exit:entry 
  0  26797                 ttm_bo_put:entry 
  0  50830             ttm_bo_release:entry 
  0  27965            uvm_obj_destroy:entry 
  0  24394                rw_obj_free:entry 
  0  24395               rw_obj_free:return 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  15795     linux_dma_resv_trylock:entry 
  0  16082     linux_ww_mutex_trylock:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  16992          mutex_vector_exit:entry 
  0  16993         mutex_vector_exit:return 
  0  16083    linux_ww_mutex_trylock:return 
  0  15796    linux_dma_resv_trylock:return 
  0  15793 linux_dma_resv_test_signaled_rcu:entry 
  0  15741    linux_dma_fence_get_rcu:entry 
  0  15742   linux_dma_fence_get_rcu:return 
  0  15751 linux_dma_fence_is_signaled:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  42401 linux_dma_fence_is_signaled_locked.part.0:entry 
  0  46701   radeon_fence_is_signaled:entry 
  0  15808    linux_down_read_trylock:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  16992          mutex_vector_exit:entry 
  0  16993         mutex_vector_exit:return 
  0  15809   linux_down_read_trylock:return 
  0  46690      radeon_fence_activity:entry 
  0  15981   linux_queue_delayed_work:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  30419               acquire_work:entry 
  0  30420              acquire_work:return 
  0  16992          mutex_vector_exit:entry 
  0  16993         mutex_vector_exit:return 
  0  15982  linux_queue_delayed_work:return 
  0  46691     radeon_fence_activity:return 
  0  16052              linux_up_read:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  16992          mutex_vector_exit:entry 
  0  16993         mutex_vector_exit:return 
  0  46702  radeon_fence_is_signaled:return 
  0  42402 linux_dma_fence_is_signaled_locked.part.0:return 
  0  16992          mutex_vector_exit:entry 
  0  16993         mutex_vector_exit:return 
  0  15752 linux_dma_fence_is_signaled:return 
  0  15753        linux_dma_fence_put:entry 
  0  15754       linux_dma_fence_put:return 
  0  15794 linux_dma_resv_test_signaled_rcu:return 
  0  50808        ttm_bo_del_from_lru:entry 
  0  50809       ttm_bo_del_from_lru:return 
  0  50800      ttm_bo_add_mem_to_lru:entry 
  0  50801     ttm_bo_add_mem_to_lru:return 
  0  16084      linux_ww_mutex_unlock:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  16992          mutex_vector_exit:entry 
  0  16993         mutex_vector_exit:return 
  0  16992          mutex_vector_exit:entry 
  0  15981   linux_queue_delayed_work:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  30419               acquire_work:entry 
  0  30420              acquire_work:return 
  0   5534               callout_init:entry 
  0   5535              callout_init:return 
  0   5544            callout_setfunc:entry 
  0   5543           callout_schedule:entry 
  0  33662    callout_schedule_locked:entry 
  0  16992          mutex_vector_exit:entry 
  0  15982  linux_queue_delayed_work:return 
  0  50831            ttm_bo_release:return 
  0  26786 ttm_bo_move_accel_cleanup:return 
  0  15753        linux_dma_fence_put:entry 
  0  15754       linux_dma_fence_put:return 
  0  46782 radeon_move_blit.constprop.0.isra.0:return 
  0  46597            radeon_bo_move:return 
  0  50818    ttm_bo_handle_move_mem:return 
  0  26808           ttm_bo_validate:return 
  0  22685 radeon_bo_fault_reserve_notify:return 
  0  15751 linux_dma_fence_is_signaled:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  42401 linux_dma_fence_is_signaled_locked.part.0:entry 
  0  46701   radeon_fence_is_signaled:entry 
  0  15808    linux_down_read_trylock:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  16992          mutex_vector_exit:entry 
  0  16993         mutex_vector_exit:return 
  0  15809   linux_down_read_trylock:return 
  0  46690      radeon_fence_activity:entry 
  0  15981   linux_queue_delayed_work:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  30419               acquire_work:entry 
  0  30420              acquire_work:return 
  0  16992          mutex_vector_exit:entry 
  0  16993         mutex_vector_exit:return 
  0  15982  linux_queue_delayed_work:return 
  0  46691     radeon_fence_activity:return 
  0  16052              linux_up_read:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  16992          mutex_vector_exit:entry 
  0  16993         mutex_vector_exit:return 
  0  46702  radeon_fence_is_signaled:return 
  0  42402 linux_dma_fence_is_signaled_locked.part.0:return 
  0  16992          mutex_vector_exit:entry 
  0  15752 linux_dma_fence_is_signaled:return 
  0  15763       linux_dma_fence_wait:entry 
  0  15767 linux_dma_fence_wait_timeout:entry 
  0  46695  radeon_fence_default_wait:entry 
  0  15723 linux_dma_fence_add_callback:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  35175 dma_fence_ensure_signal_enabled:entry 
  0  46697 radeon_fence_enable_signaling:entry 
  0  15808    linux_down_read_trylock:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  16992          mutex_vector_exit:entry 
  0  16993         mutex_vector_exit:return 
  0  15809   linux_down_read_trylock:return 
  0  22992  radeon_irq_kms_sw_irq_get:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0   9490          evergreen_irq_set:entry 
  0   2745                  __drm_dbg:entry 
  0   2746                 __drm_dbg:return 
  0   2745                  __drm_dbg:entry 
  0   2746                 __drm_dbg:return 
  0  22990 radeon_irq_kms_set_irq_n_enabled:entry 
  0  22991 radeon_irq_kms_set_irq_n_enabled:return 
  0  22990 radeon_irq_kms_set_irq_n_enabled:entry 
  0  22991 radeon_irq_kms_set_irq_n_enabled:return 
  0  22990 radeon_irq_kms_set_irq_n_enabled:entry 
  0  22991 radeon_irq_kms_set_irq_n_enabled:return 
  0  22990 radeon_irq_kms_set_irq_n_enabled:entry 
  0  22991 radeon_irq_kms_set_irq_n_enabled:return 
  0  22990 radeon_irq_kms_set_irq_n_enabled:entry 
  0  22991 radeon_irq_kms_set_irq_n_enabled:return 
  0  22990 radeon_irq_kms_set_irq_n_enabled:entry 
  0  22991 radeon_irq_kms_set_irq_n_enabled:return 
  0  22990 radeon_irq_kms_set_irq_n_enabled:entry 
  0  22991 radeon_irq_kms_set_irq_n_enabled:return 
  0  22990 radeon_irq_kms_set_irq_n_enabled:entry 
  0  22991 radeon_irq_kms_set_irq_n_enabled:return 
  0  22990 radeon_irq_kms_set_irq_n_enabled:entry 
  0  22991 radeon_irq_kms_set_irq_n_enabled:return 
  0  22990 radeon_irq_kms_set_irq_n_enabled:entry 
  0  22991 radeon_irq_kms_set_irq_n_enabled:return 
  0  22990 radeon_irq_kms_set_irq_n_enabled:entry 
  0  22991 radeon_irq_kms_set_irq_n_enabled:return 
  0  22990 radeon_irq_kms_set_irq_n_enabled:entry 
  0  22991 radeon_irq_kms_set_irq_n_enabled:return 
  0  22990 radeon_irq_kms_set_irq_n_enabled:entry 
  0  22991 radeon_irq_kms_set_irq_n_enabled:return 
  0  22990 radeon_irq_kms_set_irq_n_enabled:entry 
  0  22991 radeon_irq_kms_set_irq_n_enabled:return 
  0  22990 radeon_irq_kms_set_irq_n_enabled:entry 
  0  22991 radeon_irq_kms_set_irq_n_enabled:return 
  0  22990 radeon_irq_kms_set_irq_n_enabled:entry 
  0  22991 radeon_irq_kms_set_irq_n_enabled:return 
  0   9491         evergreen_irq_set:return 
  0  16992          mutex_vector_exit:entry 
  0  16993         mutex_vector_exit:return 
  0  46690      radeon_fence_activity:entry 
  0  15981   linux_queue_delayed_work:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  30419               acquire_work:entry 
  0  30420              acquire_work:return 
  0  16992          mutex_vector_exit:entry 
  0  16993         mutex_vector_exit:return 
  0  15982  linux_queue_delayed_work:return 
  0  46691     radeon_fence_activity:return 
  0  16052              linux_up_read:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  16992          mutex_vector_exit:entry 
  0  16993         mutex_vector_exit:return 
  0  15739        linux_dma_fence_get:entry 
  0  15740       linux_dma_fence_get:return 
  0  29569            DMA_FENCE_TRACE:entry 
  0  29570           DMA_FENCE_TRACE:return 
  0  46698 radeon_fence_enable_signaling:return 
  0  35176 dma_fence_ensure_signal_enabled:return 
  0  16992          mutex_vector_exit:entry 
  0  15724 linux_dma_fence_add_callback:return 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  10585                   getticks:entry 
  0  10586                  getticks:return 
  0   7128           cv_timedwait_sig:entry 
  0  16257              lwp_unlock_to:entry 
  0   2924             _kernel_unlock:entry 
  0   2925            _kernel_unlock:return 
  0  25146             sleepq_enqueue:entry 
  0  10585                   getticks:entry 
  0  10586                  getticks:return 
  0  16992          mutex_vector_exit:entry 
  0  16993         mutex_vector_exit:return 
  0  25144               sleepq_block:entry 
  0  15143                    ktr_csw:entry 
  0  15144                   ktr_csw:return 
  0   5543           callout_schedule:entry 
  0  33662    callout_schedule_locked:entry 
  0  16542                  mi_switch:entry 
  0   4938                  binuptime:entry 
  0  50781          tsc_get_timecount:entry 
  0  50782         tsc_get_timecount:return 
  0   4939                 binuptime:return 
  0  24490              sched_nextlwp:entry 
  0  10585                   getticks:entry 
  0  10586                  getticks:return 
  0  24491             sched_nextlwp:return 
  0  21046            pmap_deactivate:entry 
  0  21094          pmap_tlb_shootnow:entry 
  0  21095         pmap_tlb_shootnow:return 
  0  21047           pmap_deactivate:return 
  0  25614            svs_lwp_switch:return 
  0  16543                 mi_switch:return 
  0   5530               callout_halt:entry 
  0   5531              callout_halt:return 
  0  24972               sigispending:entry 
  0  24973              sigispending:return 
  0  15143                    ktr_csw:entry 
  0  15144                   ktr_csw:return 
  0  25145              sleepq_block:return 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0   7129          cv_timedwait_sig:return 
  0  10585                   getticks:entry 
  0  10586                  getticks:return 
  0  16992          mutex_vector_exit:entry 
  0  15755 linux_dma_fence_remove_callback:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  16992          mutex_vector_exit:entry 
  0  15756 linux_dma_fence_remove_callback:return 
  0  46696 radeon_fence_default_wait:return 
  0  15768 linux_dma_fence_wait_timeout:return 
  0  15764      linux_dma_fence_wait:return 
  0  28131      uvmfault_update_stats:entry 
  0  28132     uvmfault_update_stats:return 
  0  15753        linux_dma_fence_put:entry 
  0  15754       linux_dma_fence_put:return 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  26789    ttm_bo_move_to_lru_tail:entry 
  0  50808        ttm_bo_del_from_lru:entry 
  0  50809       ttm_bo_del_from_lru:return 
  0  50800      ttm_bo_add_mem_to_lru:entry 
  0  50801     ttm_bo_add_mem_to_lru:return 
  0  26790   ttm_bo_move_to_lru_tail:return 
  0  16992          mutex_vector_exit:entry 
  0  16084      linux_ww_mutex_unlock:entry 
  0  16990         mutex_vector_enter:entry 
  0  16991        mutex_vector_enter:return 
  0  16992          mutex_vector_exit:entry 
  0  26806          ttm_bo_uvm_fault:return 
  0  26806          ttm_bo_uvm_fault:return returns 134 or 14

  0  26701                 trapsignal:entry 
  0    158                 none:signal-send signal-send
  0    158                 none:signal-send signal-send
  0    158                 none:signal-send signal-send
  0    158                 none:signal-send signal-send


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