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[Jürg Häfliger <1941898@xxxxxxxxxxxxxxxxxx>]

** Tags added: kernel-daily-bug

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https://bugs.launchpad.net/bugs/1941898

Title:
  ubuntu_kernel_selftests.ftrace timeout on H/riscv

Status in ubuntu-kernel-tests:
  Fix Released
Status in linux-riscv package in Ubuntu:
  Invalid
Status in linux-riscv source package in Hirsute:
  Won't Fix

Bug description:
  ubuntu_kernel_selftests.ftrace times out always after the same step
  when running on hirsute/linux-riscv on the regression tests
  infrastructure (QEMU VM).

  Log from the tests running with hirsute/linux-riscv 5.11.0-1018.19:

  18:02:56 INFO | 	START	ubuntu_kernel_selftests.ftrace	ubuntu_kernel_selftests.ftrace	timestamp=1629568976	timeout=1800	localtime=Aug 21 18:02:56	
  18:02:56 DEBUG| Persistent state client._record_indent now set to 2
  18:02:56 DEBUG| Persistent state client.unexpected_reboot now set to ('ubuntu_kernel_selftests.ftrace', 'ubuntu_kernel_selftests.ftrace')
  18:02:56 DEBUG| Waiting for pid 29328 for 1800 seconds
  18:02:56 WARNI| System python is too old, crash handling disabled
  18:02:56 DEBUG| Running 'sudo sh -c 'echo 1 > /proc/sys/net/ipv4/conf/all/accept_local''
  18:02:56 DEBUG| Running 'sudo make -C linux/tools/testing/selftests TARGETS=ftrace run_tests'
  18:02:57 DEBUG| [stdout] make: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests'
  18:02:57 DEBUG| [stdout] make --no-builtin-rules ARCH=riscv -C ../../.. headers_install
  18:02:57 DEBUG| [stdout] make[1]: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux'
  18:03:13 DEBUG| [stdout]   INSTALL ./usr/include
  18:03:14 DEBUG| [stdout] make[1]: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux'
  18:03:14 DEBUG| [stdout] make[1]: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/ftrace'
  18:03:14 DEBUG| [stdout] make[1]: Nothing to be done for 'all'.
  18:03:14 DEBUG| [stdout] make[1]: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/ftrace'
  18:03:15 DEBUG| [stdout] make[1]: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/ftrace'
  18:03:15 DEBUG| [stdout] TAP version 13
  18:03:15 DEBUG| [stdout] 1..1
  18:03:15 DEBUG| [stdout] # selftests: ftrace: ftracetest
  18:03:15 ERROR| [stderr] perl: warning: Setting locale failed.
  18:03:15 ERROR| [stderr] perl: warning: Please check that your locale settings:
  18:03:15 ERROR| [stderr] 	LANGUAGE = (unset),
  18:03:15 ERROR| [stderr] 	LC_ALL = (unset),
  18:03:15 ERROR| [stderr] 	LC_CTYPE = "C.UTF-8",
  18:03:15 ERROR| [stderr] 	LANG = "en_US.UTF-8"
  18:03:15 ERROR| [stderr]     are supported and installed on your system.
  18:03:15 ERROR| [stderr] perl: warning: Falling back to the standard locale ("C").
  18:03:16 DEBUG| [stdout] # === Ftrace unit tests ===
  18:03:21 DEBUG| [stdout] # [1] Basic trace file check	[PASS]
  18:03:58 DEBUG| [stdout] # [2] Basic test for tracers	[PASS]
  18:04:04 DEBUG| [stdout] # [3] Basic trace clock test	[PASS]
  18:04:10 DEBUG| [stdout] # [4] Basic event tracing check	[PASS]
  18:04:16 DEBUG| [stdout] # [5] Change the ringbuffer size	[PASS]
  18:04:21 DEBUG| [stdout] # [6] Snapshot and tracing setting	[PASS]
  18:04:27 DEBUG| [stdout] # [7] trace_pipe and trace_marker	[PASS]
  18:04:32 DEBUG| [stdout] # [8] Test ftrace direct functions against tracers	[UNRESOLVED]
  18:04:33 DEBUG| [stdout] # [9] Test ftrace direct functions against kprobes	[UNSUPPORTED]
  18:04:38 DEBUG| [stdout] # [10] Generic dynamic event - add/remove kprobe events	[FAIL]
  18:04:39 DEBUG| [stdout] # [11] Generic dynamic event - add/remove synthetic events	[UNSUPPORTED]
  18:04:39 DEBUG| [stdout] # [12] Generic dynamic event - selective clear (compatibility)	[UNSUPPORTED]
  18:04:40 DEBUG| [stdout] # [13] Generic dynamic event - generic clear event	[UNSUPPORTED]
  18:04:46 DEBUG| [stdout] # [14] event tracing - enable/disable with event level files	[PASS]
  18:04:54 DEBUG| [stdout] # [15] event tracing - restricts events based on pid notrace filtering	[PASS]
  18:05:00 DEBUG| [stdout] # [16] event tracing - restricts events based on pid	[PASS]
  18:05:07 DEBUG| [stdout] # [17] event tracing - enable/disable with subsystem level files	[PASS]
  18:05:14 DEBUG| [stdout] # [18] event tracing - enable/disable with top level files	[PASS]
  18:05:21 DEBUG| [stdout] # [19] Test trace_printk from module	[PASS]
  18:05:39 DEBUG| [stdout] # [20] ftrace - function graph filters with stack tracer	[PASS]
  18:05:50 DEBUG| [stdout] # [21] ftrace - function graph filters	[PASS]
  18:06:04 DEBUG| [stdout] # [22] ftrace - function pid notrace filters	[PASS]
  18:06:18 DEBUG| [stdout] # [23] ftrace - function pid filters	[PASS]
  18:06:28 DEBUG| [stdout] # [24] ftrace - stacktrace filter command	[PASS]
  18:06:38 DEBUG| [stdout] # [25] ftrace - function trace with cpumask	[PASS]
  18:07:09 DEBUG| [stdout] # [26] ftrace - test for function event triggers	[FAIL]
  18:07:28 DEBUG| [stdout] # [27] ftrace - function trace on module	[PASS]
  18:07:37 INFO | Timer expired (1800 sec.), nuking pid 29328
  18:07:37 INFO | 		ERROR	ubuntu_kernel_selftests.ftrace	ubuntu_kernel_selftests.ftrace	timestamp=1629569257	localtime=Aug 21 18:07:37	Unhandled AutoservRunError: Could not kill 29328
    None
    Traceback (most recent call last):
      File "/home/ubuntu/autotest/client/job.py", line 510, in _runtest
        parallel.fork_waitfor_timed(self.resultdir, pid, timeout)
      File "/home/ubuntu/autotest/client/parallel.py", line 112, in fork_waitfor_timed
        utils.nuke_pid(pid)
      File "/home/ubuntu/autotest/client/shared/utils.py", line 1214, in nuke_pid
        raise error.AutoservRunError('Could not kill %d' % pid, None)
    AutoservRunError: Could not kill 29328
    None
    
  18:07:37 INFO | 	END ERROR	ubuntu_kernel_selftests.ftrace	ubuntu_kernel_selftests.ftrace	timestamp=1629569257	localtime=Aug 21 18:07:37	

  For reference, the two failures are reported on bug 1923682 and bug
  1923683.

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