ftrace from ubuntu_kernel_selftests failed with add/remove kprobe events on H/F riscv

[Kelsey Steele]

ftrace from ubuntu_kernel_selftests failed with add/remove kprobe events on G/riscv 5.8.0-21.23 and F/riscv-5.8 5.8.0-21.23~20.04.1

Not a regression as it has appeared on previous versions as recorded in LP#1894613 comment:
https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1894613/comments/8

The test results appear to be getting cut off. Below is all that could be retrieved currently from regression testing:

03/27 04:52:37 DEBUG| utils:0116| Running 'sudo sh -c 'echo 1 > /proc/sys/net/ipv4/conf/all/accept_local''
03/27 04:52:38 DEBUG| utils:0116| Running 'sudo make -C linux/tools/testing/selftests TARGETS=ftrace run_tests'
03/27 04:52:38 DEBUG| utils:0153| [stdout] make: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests'
03/27 04:52:39 DEBUG| utils:0153| [stdout] make --no-builtin-rules ARCH=riscv -C ../../.. headers_install
03/27 04:52:39 DEBUG| utils:0153| [stdout] make[1]: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux'
03/27 04:52:53 DEBUG| utils:0153| [stdout] INSTALL ./usr/include
03/27 04:52:54 DEBUG| utils:0153| [stdout] make[1]: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux'
03/27 04:52:54 DEBUG| utils:0153| [stdout] make[1]: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/ftrace'
03/27 04:52:54 DEBUG| utils:0153| [stdout] make[1]: Nothing to be done for 'all'.
03/27 04:52:54 DEBUG| utils:0153| [stdout] make[1]: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/ftrace'
03/27 04:52:54 DEBUG| utils:0153| [stdout] make[1]: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/ftrace'
03/27 04:52:54 DEBUG| utils:0153| [stdout] TAP version 13
03/27 04:52:54 DEBUG| utils:0153| [stdout] 1..1
03/27 04:52:55 DEBUG| utils:0153| [stdout] # selftests: ftrace: ftracetest
03/27 04:52:55 ERROR| utils:0153| [stderr] perl: warning: Setting locale failed.
03/27 04:52:55 ERROR| utils:0153| [stderr] perl: warning: Please check that your locale settings:
03/27 04:52:55 ERROR| utils:0153| [stderr] LANGUAGE = (unset),
03/27 04:52:55 ERROR| utils:0153| [stderr] LC_ALL = (unset),
03/27 04:52:55 ERROR| utils:0153| [stderr] LC_CTYPE = "C.UTF-8",
03/27 04:52:55 ERROR| utils:0153| [stderr] LANG = "en_US.UTF-8"
03/27 04:52:55 ERROR| utils:0153| [stderr] are supported and installed on your system.
03/27 04:52:55 ERROR| utils:0153| [stderr] perl: warning: Falling back to the standard locale ("C").
03/27 04:52:55 DEBUG| utils:0153| [stdout] # === Ftrace unit tests ===
03/27 04:53:00 DEBUG| utils:0153| [stdout] # [1] Basic trace file check [PASS]
03/27 04:53:44 DEBUG| utils:0153| [stdout] # [2] Basic test for tracers [PASS]
03/27 04:53:52 DEBUG| utils:0153| [stdout] # [3] Basic trace clock test [PASS]
03/27 04:53:57 DEBUG| utils:0153| [stdout] # [4] Basic event tracing check [PASS]
03/27 04:54:02 DEBUG| utils:0153| [stdout] # [5] Change the ringbuffer size [PASS]
03/27 04:54:08 DEBUG| utils:0153| [stdout] # [6] Snapshot and tracing setting [PASS]
03/27 04:54:13 DEBUG| utils:0153| [stdout] # [7] trace_pipe and trace_marker [PASS]
03/27 04:54:19 DEBUG| utils:0153| [stdout] # [8] Test ftrace direct functions against tracers [UNRESOLVED]
03/27 04:54:19 DEBUG| utils:0153| [stdout] # [9] Test ftrace direct functions against kprobes [UNSUPPORTED]
03/27 04:54:24 DEBUG| utils:0153| [stdout] # [10] Generic dynamic event - add/remove kprobe events [FAIL]
03/27 04:54:24 DEBUG| utils:0153| [stdout] # [11] Generic dynamic event - add/remove synthetic events [UNSUPPORTED]
03/27 04:54:25 DEBUG| utils:0153| [stdout] # [12] Generic dynamic event - selective clear (compatibility) [UNSUPPORTED]
03/27 04:54:26 DEBUG| utils:0153| [stdout] # [13] Generic dynamic event - generic clear event [UNSUPPORTED]
03/27 04:54:31 DEBUG| utils:0153| [stdout] # [14] event tracing - enable/disable with event level files [PASS]
03/27 04:54:39 DEBUG| utils:0153| [stdout] # [15] event tracing - restricts events based on pid notrace filtering [PASS]
03/27 04:54:45 DEBUG| utils:0153| [stdout] # [16] event tracing - restricts events based on pid [PASS]
03/27 04:54:51 DEBUG| utils:0153| [stdout] # [17] event tracing - enable/disable with subsystem level files [PASS]
03/27 04:54:57 DEBUG| utils:0153| [stdout] # [18] event tracing - enable/disable with top level files [PASS]
03/27 04:55:04 DEBUG| utils:0153| [stdout] # [19] Test trace_printk from module [PASS]
03/27 04:55:41 DEBUG| utils:0153| [stdout] # [20] ftrace - function graph filters with stack tracer [PASS]
03/27 04:56:09 DEBUG| utils:0153| [stdout] # [21] ftrace - function graph filters [PASS]
03/27 04:56:54 DEBUG| utils:0153| [stdout] # [22] ftrace - function pid notrace filters [PASS]
03/27 04:57:38 DEBUG| utils:0153| [stdout] # [23] ftrace - function pid filters [PASS]
03/27 04:58:02 DEBUG| utils:0153| [stdout] # [24] ftrace - stacktrace filter command [PASS]
03/27 04:58:12 DEBUG| utils:0153| [stdout] # [25] ftrace - function trace with cpumask [PASS]
03/27 04:59:42 DEBUG| utils:0153| [stdout] # [26] ftrace - test for function event triggers [PASS]
03/27 05:00:44 DEBUG| utils:0153| [stdout] # [27] ftrace - function trace on module [PASS]

[Kleber Sacilotto de Souza (kleber-souza)]

Also spotted with groovy/linux-kvm 5.8.0-1025.27.

[Guilherme G. Piccoli (gpiccoli)]

I suggest we mark this one as duplicate of LP #1923683 or vice-versa.

Observed in G/RISC-V, cycle sru-20210510 .

[Guilherme G. Piccoli (gpiccoli)]

Observed on G/KVM, cycle sru-20210531 .

[Kleber Sacilotto de Souza (kleber-souza)]

Groovy has reached EOL but the same issue also affected hirsure/linux-riscv.

[Po-Hsu Lin (cypressyew)]

Let's track this on bug 1940080

As the issue reported there is for G-5.8 / F-5.8