Public bug reported:

Test failed with the disco master-next branch:

TAP version 13
selftests: ftrace: ftracetest
========================================
=== Ftrace unit tests ===
[1] Basic trace file check      [PASS]
[2] Basic test for tracers      [PASS]
[3] Basic trace clock test      [PASS]
[4] Basic event tracing check   [PASS]
[5] Change the ringbuffer size  [PASS]
[6] Snapshot and tracing setting        [PASS]
[7] trace_pipe and trace_marker [PASS]
[8] Generic dynamic event - add/remove kprobe events    [PASS]
[9] Generic dynamic event - add/remove synthetic events [PASS]
[10] Generic dynamic event - selective clear (compatibility)    [PASS]
[11] Generic dynamic event - generic clear event        [PASS]
[12] event tracing - enable/disable with event level files      [PASS]
[13] event tracing - restricts events based on pid      [PASS]
[14] event tracing - enable/disable with subsystem level files  [PASS]
[15] event tracing - enable/disable with top level files        [PASS]
[16] Test trace_printk from module      [PASS]
[17] ftrace - function graph filters with stack tracer  [PASS]
[18] ftrace - function graph filters    [PASS]
[19] ftrace - function glob filters     [PASS]
[20] ftrace - function pid filters      [PASS]
[21] ftrace - stacktrace filter command [PASS]
[22] ftrace - function trace with cpumask       [PASS]
[23] ftrace - test for function event triggers  [PASS]
[24] ftrace - function trace on module  [PASS]
[25] ftrace - function profiling        [PASS]
[26] ftrace - function profiler with function tracing   [PASS]
[27] ftrace - test reading of set_ftrace_filter [PASS]
[28] ftrace - Max stack tracer  [PASS]
[29] ftrace - test for function traceon/off triggers    [FAIL]
[30] Test creation and deletion of trace instances while setting an event       
[PASS]
[31] Test creation and deletion of trace instances      [PASS]
[32] Kprobe dynamic event - adding and removing [PASS]
[33] Kprobe dynamic event - busy event check    [PASS]
[34] Kprobe dynamic event with arguments        [PASS]
[35] Kprobe event with comm arguments   [PASS]
[36] Kprobe event string type argument  [PASS]
[37] Kprobe event symbol argument       [PASS]
[38] Kprobe event argument syntax       [PASS]
[39] Kprobes event arguments with types [PASS]
[40] Kprobe event auto/manual naming    [PASS]
[41] Kprobe dynamic event with function tracer  [PASS]
[42] Kprobe dynamic event - probing module      [PASS]
[43] Kretprobe dynamic event with arguments     [PASS]
[44] Kretprobe dynamic event with maxactive     [PASS]
[45] Register/unregister many kprobe events     [PASS]
[46] Kprobe events - probe points       [PASS]
[47] Kprobe dynamic event - adding and removing [PASS]
[48] test for the preemptirqsoff tracer [UNSUPPORTED]
[49] Test wakeup tracer [PASS]
[50] Test wakeup RT tracer      [PASS]
[51] event trigger - test extended error support        [PASS]
[52] event trigger - test field variable support        [PASS]
[53] event trigger - test inter-event combined histogram trigger        [PASS]
[54] event trigger - test multiple actions on hist trigger      [PASS]
[55] event trigger - test inter-event histogram trigger onmatch action  [PASS]
[56] event trigger - test inter-event histogram trigger onmatch-onmax action    
[PASS]
[57] event trigger - test inter-event histogram trigger onmax action    [PASS]
[58] event trigger - test synthetic event create remove [PASS]
[59] event trigger - test synthetic_events syntax parser        [PASS]
[60] event trigger - test event enable/disable trigger  [PASS]
[61] event trigger - test trigger filter        [PASS]
[62] event trigger - test histogram modifiers   [PASS]
[63] event trigger - test histogram trigger     [PASS]
[64] event trigger - test multiple histogram triggers   [PASS]
[65] event trigger - test snapshot-trigger      [PASS]
[66] event trigger - test stacktrace-trigger    [PASS]
[67] trace_marker trigger - test histogram trigger      [PASS]
[68] trace_marker trigger - test snapshot trigger       [PASS]
[69] trace_marker trigger - test histogram with synthetic event against kernel 
event    [PASS]
[70] trace_marker trigger - test histogram with synthetic event [PASS]
[71] event trigger - test traceon/off trigger   [PASS]
[72] (instance)  Basic test for tracers [PASS]
[73] (instance)  Basic trace clock test [PASS]
[74] (instance)  Change the ringbuffer size     [PASS]
[75] (instance)  Snapshot and tracing setting   [PASS]
[76] (instance)  trace_pipe and trace_marker    [PASS]
[77] (instance)  event tracing - enable/disable with event level files  [PASS]
[78] (instance)  event tracing - restricts events based on pid  [PASS]
[79] (instance)  event tracing - enable/disable with subsystem level files      
[PASS]
[80] (instance)  ftrace - stacktrace filter command     [PASS]
[81] (instance)  ftrace - test for function event triggers      [PASS]
[82] (instance)  ftrace - test for function traceon/off triggers        [PASS]
[83] (instance)  event trigger - test event enable/disable trigger      [PASS]
[84] (instance)  event trigger - test trigger filter    [PASS]
[85] (instance)  event trigger - test histogram modifiers       [PASS]
[86] (instance)  event trigger - test histogram trigger [PASS]
[87] (instance)  event trigger - test multiple histogram triggers       [PASS]
[88] (instance)  trace_marker trigger - test histogram trigger  [PASS]
[89] (instance)  trace_marker trigger - test snapshot trigger   [PASS]

# of passed:  87
# of failed:  1
# of unresolved:  0
# of untested:  0
# of unsupported:  1
# of xfailed:  0
# of undefined(test bug):  0
not ok 1..1 selftests: ftrace: ftracetest [FAIL]

However it can pass with the upstream tree:
# [28] ftrace - Max stack tracer        [PASS]
# [29] ftrace - test for function traceon/off triggers  [PASS]
# [30] ftrace - test tracing error log support  [FAIL]
# [31] Test creation and deletion of trace instances while setting an event     
[PASS]
# [32] Test creation and deletion of trace instances    [PASS]

So it looks like a test case issue in our kernel tree from this point.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: linux-image-5.0.0-20-generic 5.0.0-20.21
ProcVersionSignature: User Name 5.0.0-20.21-generic 5.0.8
Uname: Linux 5.0.0-20-generic aarch64
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116,  1 Jul 18 04:23 seq
 crw-rw---- 1 root audio 116, 33 Jul 18 04:23 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.10-0ubuntu27.1
Architecture: arm64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
Date: Thu Jul 18 12:03:43 2019
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
MachineType: Cavium ThunderX CRB
PciMultimedia:

ProcFB:
 0 EFI VGA
 1 astdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-20-generic 
root=UUID=d4e5f461-24ef-47d8-a67f-42c82ff1efe8 ro
RelatedPackageVersions:
 linux-restricted-modules-5.0.0-20-generic N/A
 linux-backports-modules-5.0.0-20-generic  N/A
 linux-firmware                            1.178.2
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/12/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 5.11
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: To be filled by O.E.M.
dmi.board.vendor: To be filled by O.E.M.
dmi.board.version: To be filled by O.E.M.
dmi.chassis.asset.tag: To be filled by O.E.M.
dmi.chassis.type: 0
dmi.chassis.vendor: Cavium
dmi.chassis.version: To be filled by O.E.M.
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr5.11:bd12/12/2012:svnCavium:pnThunderXCRB:pvrTobefilledbyO.E.M.:rvnTobefilledbyO.E.M.:rnTobefilledbyO.E.M.:rvrTobefilledbyO.E.M.:cvnCavium:ct0:cvrTobefilledbyO.E.M.:
dmi.product.family: Default string
dmi.product.name: ThunderX CRB
dmi.product.sku: Default string
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Cavium

** Affects: ubuntu-kernel-tests
     Importance: Undecided
         Status: New

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: linux (Ubuntu Disco)
     Importance: Undecided
         Status: New


** Tags: 5.0 apport-bug arm64 disco sru-20190701 ubuntu-kernel-selftests 
uec-images

** Description changed:

  Test failed with the disco master-next branch:
  
  TAP version 13
  selftests: ftrace: ftracetest
  ========================================
  === Ftrace unit tests ===
  [1] Basic trace file check    [PASS]
  [2] Basic test for tracers    [PASS]
  [3] Basic trace clock test    [PASS]
  [4] Basic event tracing check [PASS]
  [5] Change the ringbuffer size        [PASS]
  [6] Snapshot and tracing setting      [PASS]
  [7] trace_pipe and trace_marker       [PASS]
  [8] Generic dynamic event - add/remove kprobe events  [PASS]
  [9] Generic dynamic event - add/remove synthetic events       [PASS]
  [10] Generic dynamic event - selective clear (compatibility)  [PASS]
  [11] Generic dynamic event - generic clear event      [PASS]
  [12] event tracing - enable/disable with event level files    [PASS]
  [13] event tracing - restricts events based on pid    [PASS]
  [14] event tracing - enable/disable with subsystem level files        [PASS]
  [15] event tracing - enable/disable with top level files      [PASS]
  [16] Test trace_printk from module    [PASS]
  [17] ftrace - function graph filters with stack tracer        [PASS]
  [18] ftrace - function graph filters  [PASS]
  [19] ftrace - function glob filters   [PASS]
  [20] ftrace - function pid filters    [PASS]
  [21] ftrace - stacktrace filter command       [PASS]
  [22] ftrace - function trace with cpumask     [PASS]
  [23] ftrace - test for function event triggers        [PASS]
  [24] ftrace - function trace on module        [PASS]
  [25] ftrace - function profiling      [PASS]
  [26] ftrace - function profiler with function tracing [PASS]
  [27] ftrace - test reading of set_ftrace_filter       [PASS]
  [28] ftrace - Max stack tracer        [PASS]
  [29] ftrace - test for function traceon/off triggers  [FAIL]
  [30] Test creation and deletion of trace instances while setting an event     
[PASS]
  [31] Test creation and deletion of trace instances    [PASS]
  [32] Kprobe dynamic event - adding and removing       [PASS]
  [33] Kprobe dynamic event - busy event check  [PASS]
  [34] Kprobe dynamic event with arguments      [PASS]
  [35] Kprobe event with comm arguments [PASS]
  [36] Kprobe event string type argument        [PASS]
  [37] Kprobe event symbol argument     [PASS]
  [38] Kprobe event argument syntax     [PASS]
  [39] Kprobes event arguments with types       [PASS]
  [40] Kprobe event auto/manual naming  [PASS]
  [41] Kprobe dynamic event with function tracer        [PASS]
  [42] Kprobe dynamic event - probing module    [PASS]
  [43] Kretprobe dynamic event with arguments   [PASS]
  [44] Kretprobe dynamic event with maxactive   [PASS]
  [45] Register/unregister many kprobe events   [PASS]
  [46] Kprobe events - probe points     [PASS]
  [47] Kprobe dynamic event - adding and removing       [PASS]
  [48] test for the preemptirqsoff tracer       [UNSUPPORTED]
  [49] Test wakeup tracer       [PASS]
  [50] Test wakeup RT tracer    [PASS]
  [51] event trigger - test extended error support      [PASS]
  [52] event trigger - test field variable support      [PASS]
  [53] event trigger - test inter-event combined histogram trigger      [PASS]
  [54] event trigger - test multiple actions on hist trigger    [PASS]
  [55] event trigger - test inter-event histogram trigger onmatch action        
[PASS]
  [56] event trigger - test inter-event histogram trigger onmatch-onmax action  
[PASS]
  [57] event trigger - test inter-event histogram trigger onmax action  [PASS]
  [58] event trigger - test synthetic event create remove       [PASS]
  [59] event trigger - test synthetic_events syntax parser      [PASS]
  [60] event trigger - test event enable/disable trigger        [PASS]
  [61] event trigger - test trigger filter      [PASS]
  [62] event trigger - test histogram modifiers [PASS]
  [63] event trigger - test histogram trigger   [PASS]
  [64] event trigger - test multiple histogram triggers [PASS]
  [65] event trigger - test snapshot-trigger    [PASS]
  [66] event trigger - test stacktrace-trigger  [PASS]
  [67] trace_marker trigger - test histogram trigger    [PASS]
  [68] trace_marker trigger - test snapshot trigger     [PASS]
  [69] trace_marker trigger - test histogram with synthetic event against 
kernel event  [PASS]
  [70] trace_marker trigger - test histogram with synthetic event       [PASS]
  [71] event trigger - test traceon/off trigger [PASS]
  [72] (instance)  Basic test for tracers       [PASS]
  [73] (instance)  Basic trace clock test       [PASS]
  [74] (instance)  Change the ringbuffer size   [PASS]
  [75] (instance)  Snapshot and tracing setting [PASS]
  [76] (instance)  trace_pipe and trace_marker  [PASS]
  [77] (instance)  event tracing - enable/disable with event level files        
[PASS]
  [78] (instance)  event tracing - restricts events based on pid        [PASS]
  [79] (instance)  event tracing - enable/disable with subsystem level files    
[PASS]
  [80] (instance)  ftrace - stacktrace filter command   [PASS]
  [81] (instance)  ftrace - test for function event triggers    [PASS]
  [82] (instance)  ftrace - test for function traceon/off triggers      [PASS]
  [83] (instance)  event trigger - test event enable/disable trigger    [PASS]
  [84] (instance)  event trigger - test trigger filter  [PASS]
  [85] (instance)  event trigger - test histogram modifiers     [PASS]
  [86] (instance)  event trigger - test histogram trigger       [PASS]
  [87] (instance)  event trigger - test multiple histogram triggers     [PASS]
  [88] (instance)  trace_marker trigger - test histogram trigger        [PASS]
  [89] (instance)  trace_marker trigger - test snapshot trigger [PASS]
  
- 
  # of passed:  87
  # of failed:  1
  # of unresolved:  0
  # of untested:  0
  # of unsupported:  1
  # of xfailed:  0
  # of undefined(test bug):  0
  not ok 1..1 selftests: ftrace: ftracetest [FAIL]
  
- 
  However it can pass with the upstream tree:
  # [28] ftrace - Max stack tracer      [PASS]
  # [29] ftrace - test for function traceon/off triggers        [PASS]
  # [30] ftrace - test tracing error log support        [FAIL]
  # [31] Test creation and deletion of trace instances while setting an event   
[PASS]
  # [32] Test creation and deletion of trace instances  [PASS]
  
- 
- So it looks like a test case issue from this point.
+ So it looks like a test case issue in our kernel tree from this point.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 19.04
  Package: linux-image-5.0.0-20-generic 5.0.0-20.21
  ProcVersionSignature: User Name 5.0.0-20.21-generic 5.0.8
  Uname: Linux 5.0.0-20-generic aarch64
  AlsaDevices:
-  total 0
-  crw-rw---- 1 root audio 116,  1 Jul 18 04:23 seq
-  crw-rw---- 1 root audio 116, 33 Jul 18 04:23 timer
+  total 0
+  crw-rw---- 1 root audio 116,  1 Jul 18 04:23 seq
+  crw-rw---- 1 root audio 116, 33 Jul 18 04:23 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
  ApportVersion: 2.20.10-0ubuntu27.1
  Architecture: arm64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 
'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
  Date: Thu Jul 18 12:03:43 2019
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
  MachineType: Cavium ThunderX CRB
  PciMultimedia:
-  
+ 
  ProcFB:
-  0 EFI VGA
-  1 astdrmfb
+  0 EFI VGA
+  1 astdrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-20-generic 
root=UUID=d4e5f461-24ef-47d8-a67f-42c82ff1efe8 ro
  RelatedPackageVersions:
-  linux-restricted-modules-5.0.0-20-generic N/A
-  linux-backports-modules-5.0.0-20-generic  N/A
-  linux-firmware                            1.178.2
+  linux-restricted-modules-5.0.0-20-generic N/A
+  linux-backports-modules-5.0.0-20-generic  N/A
+  linux-firmware                            1.178.2
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/12/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 5.11
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: To be filled by O.E.M.
  dmi.board.vendor: To be filled by O.E.M.
  dmi.board.version: To be filled by O.E.M.
  dmi.chassis.asset.tag: To be filled by O.E.M.
  dmi.chassis.type: 0
  dmi.chassis.vendor: Cavium
  dmi.chassis.version: To be filled by O.E.M.
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr5.11:bd12/12/2012:svnCavium:pnThunderXCRB:pvrTobefilledbyO.E.M.:rvnTobefilledbyO.E.M.:rnTobefilledbyO.E.M.:rvrTobefilledbyO.E.M.:cvnCavium:ct0:cvrTobefilledbyO.E.M.:
  dmi.product.family: Default string
  dmi.product.name: ThunderX CRB
  dmi.product.sku: Default string
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: Cavium

** Also affects: linux (Ubuntu Disco)
   Importance: Undecided
       Status: New

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1837040

Title:
  function traceon/off triggers in ftace from ubuntu_kernel_selftests
  failed on Disco ARM64

Status in ubuntu-kernel-tests:
  New
Status in linux package in Ubuntu:
  New
Status in linux source package in Disco:
  New

Bug description:
  Test failed with the disco master-next branch:

  TAP version 13
  selftests: ftrace: ftracetest
  ========================================
  === Ftrace unit tests ===
  [1] Basic trace file check    [PASS]
  [2] Basic test for tracers    [PASS]
  [3] Basic trace clock test    [PASS]
  [4] Basic event tracing check [PASS]
  [5] Change the ringbuffer size        [PASS]
  [6] Snapshot and tracing setting      [PASS]
  [7] trace_pipe and trace_marker       [PASS]
  [8] Generic dynamic event - add/remove kprobe events  [PASS]
  [9] Generic dynamic event - add/remove synthetic events       [PASS]
  [10] Generic dynamic event - selective clear (compatibility)  [PASS]
  [11] Generic dynamic event - generic clear event      [PASS]
  [12] event tracing - enable/disable with event level files    [PASS]
  [13] event tracing - restricts events based on pid    [PASS]
  [14] event tracing - enable/disable with subsystem level files        [PASS]
  [15] event tracing - enable/disable with top level files      [PASS]
  [16] Test trace_printk from module    [PASS]
  [17] ftrace - function graph filters with stack tracer        [PASS]
  [18] ftrace - function graph filters  [PASS]
  [19] ftrace - function glob filters   [PASS]
  [20] ftrace - function pid filters    [PASS]
  [21] ftrace - stacktrace filter command       [PASS]
  [22] ftrace - function trace with cpumask     [PASS]
  [23] ftrace - test for function event triggers        [PASS]
  [24] ftrace - function trace on module        [PASS]
  [25] ftrace - function profiling      [PASS]
  [26] ftrace - function profiler with function tracing [PASS]
  [27] ftrace - test reading of set_ftrace_filter       [PASS]
  [28] ftrace - Max stack tracer        [PASS]
  [29] ftrace - test for function traceon/off triggers  [FAIL]
  [30] Test creation and deletion of trace instances while setting an event     
[PASS]
  [31] Test creation and deletion of trace instances    [PASS]
  [32] Kprobe dynamic event - adding and removing       [PASS]
  [33] Kprobe dynamic event - busy event check  [PASS]
  [34] Kprobe dynamic event with arguments      [PASS]
  [35] Kprobe event with comm arguments [PASS]
  [36] Kprobe event string type argument        [PASS]
  [37] Kprobe event symbol argument     [PASS]
  [38] Kprobe event argument syntax     [PASS]
  [39] Kprobes event arguments with types       [PASS]
  [40] Kprobe event auto/manual naming  [PASS]
  [41] Kprobe dynamic event with function tracer        [PASS]
  [42] Kprobe dynamic event - probing module    [PASS]
  [43] Kretprobe dynamic event with arguments   [PASS]
  [44] Kretprobe dynamic event with maxactive   [PASS]
  [45] Register/unregister many kprobe events   [PASS]
  [46] Kprobe events - probe points     [PASS]
  [47] Kprobe dynamic event - adding and removing       [PASS]
  [48] test for the preemptirqsoff tracer       [UNSUPPORTED]
  [49] Test wakeup tracer       [PASS]
  [50] Test wakeup RT tracer    [PASS]
  [51] event trigger - test extended error support      [PASS]
  [52] event trigger - test field variable support      [PASS]
  [53] event trigger - test inter-event combined histogram trigger      [PASS]
  [54] event trigger - test multiple actions on hist trigger    [PASS]
  [55] event trigger - test inter-event histogram trigger onmatch action        
[PASS]
  [56] event trigger - test inter-event histogram trigger onmatch-onmax action  
[PASS]
  [57] event trigger - test inter-event histogram trigger onmax action  [PASS]
  [58] event trigger - test synthetic event create remove       [PASS]
  [59] event trigger - test synthetic_events syntax parser      [PASS]
  [60] event trigger - test event enable/disable trigger        [PASS]
  [61] event trigger - test trigger filter      [PASS]
  [62] event trigger - test histogram modifiers [PASS]
  [63] event trigger - test histogram trigger   [PASS]
  [64] event trigger - test multiple histogram triggers [PASS]
  [65] event trigger - test snapshot-trigger    [PASS]
  [66] event trigger - test stacktrace-trigger  [PASS]
  [67] trace_marker trigger - test histogram trigger    [PASS]
  [68] trace_marker trigger - test snapshot trigger     [PASS]
  [69] trace_marker trigger - test histogram with synthetic event against 
kernel event  [PASS]
  [70] trace_marker trigger - test histogram with synthetic event       [PASS]
  [71] event trigger - test traceon/off trigger [PASS]
  [72] (instance)  Basic test for tracers       [PASS]
  [73] (instance)  Basic trace clock test       [PASS]
  [74] (instance)  Change the ringbuffer size   [PASS]
  [75] (instance)  Snapshot and tracing setting [PASS]
  [76] (instance)  trace_pipe and trace_marker  [PASS]
  [77] (instance)  event tracing - enable/disable with event level files        
[PASS]
  [78] (instance)  event tracing - restricts events based on pid        [PASS]
  [79] (instance)  event tracing - enable/disable with subsystem level files    
[PASS]
  [80] (instance)  ftrace - stacktrace filter command   [PASS]
  [81] (instance)  ftrace - test for function event triggers    [PASS]
  [82] (instance)  ftrace - test for function traceon/off triggers      [PASS]
  [83] (instance)  event trigger - test event enable/disable trigger    [PASS]
  [84] (instance)  event trigger - test trigger filter  [PASS]
  [85] (instance)  event trigger - test histogram modifiers     [PASS]
  [86] (instance)  event trigger - test histogram trigger       [PASS]
  [87] (instance)  event trigger - test multiple histogram triggers     [PASS]
  [88] (instance)  trace_marker trigger - test histogram trigger        [PASS]
  [89] (instance)  trace_marker trigger - test snapshot trigger [PASS]

  # of passed:  87
  # of failed:  1
  # of unresolved:  0
  # of untested:  0
  # of unsupported:  1
  # of xfailed:  0
  # of undefined(test bug):  0
  not ok 1..1 selftests: ftrace: ftracetest [FAIL]

  However it can pass with the upstream tree:
  # [28] ftrace - Max stack tracer      [PASS]
  # [29] ftrace - test for function traceon/off triggers        [PASS]
  # [30] ftrace - test tracing error log support        [FAIL]
  # [31] Test creation and deletion of trace instances while setting an event   
[PASS]
  # [32] Test creation and deletion of trace instances  [PASS]

  So it looks like a test case issue in our kernel tree from this point.

  ProblemType: Bug
  DistroRelease: Ubuntu 19.04
  Package: linux-image-5.0.0-20-generic 5.0.0-20.21
  ProcVersionSignature: User Name 5.0.0-20.21-generic 5.0.8
  Uname: Linux 5.0.0-20-generic aarch64
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Jul 18 04:23 seq
   crw-rw---- 1 root audio 116, 33 Jul 18 04:23 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
  ApportVersion: 2.20.10-0ubuntu27.1
  Architecture: arm64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 
'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
  Date: Thu Jul 18 12:03:43 2019
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
  MachineType: Cavium ThunderX CRB
  PciMultimedia:

  ProcFB:
   0 EFI VGA
   1 astdrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-20-generic 
root=UUID=d4e5f461-24ef-47d8-a67f-42c82ff1efe8 ro
  RelatedPackageVersions:
   linux-restricted-modules-5.0.0-20-generic N/A
   linux-backports-modules-5.0.0-20-generic  N/A
   linux-firmware                            1.178.2
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/12/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 5.11
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: To be filled by O.E.M.
  dmi.board.vendor: To be filled by O.E.M.
  dmi.board.version: To be filled by O.E.M.
  dmi.chassis.asset.tag: To be filled by O.E.M.
  dmi.chassis.type: 0
  dmi.chassis.vendor: Cavium
  dmi.chassis.version: To be filled by O.E.M.
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr5.11:bd12/12/2012:svnCavium:pnThunderXCRB:pvrTobefilledbyO.E.M.:rvnTobefilledbyO.E.M.:rnTobefilledbyO.E.M.:rvrTobefilledbyO.E.M.:cvnCavium:ct0:cvrTobefilledbyO.E.M.:
  dmi.product.family: Default string
  dmi.product.name: ThunderX CRB
  dmi.product.sku: Default string
  dmi.product.version: To be filled by O.E.M.
  dmi.sys.vendor: Cavium

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