powerpc/alignment:alignment_handler from ubuntu_kernel_selftests timeout on P9 bare-metal

[Po-Hsu Lin]

This issue can be found on Power9 bare-metal node baltar:
  * N-6.8.0-28.28
  * M-6.5.0-34.34
  * J-5.15.0-106.116

The test will just timeout.

     START ubuntu_kernel_selftests.powerpc/alignment:alignment_handler ubuntu_kernel_selftests.powerpc/alignment:alignment_handler timeout=1800 timestamp=1713400231 localtime=Apr 18 00:30:31
 Persistent state client._record_indent now set to 2
 Persistent state client.unexpected_reboot now set to ('ubuntu_kernel_selftests.powerpc/alignment:alignment_handler', 'ubuntu_kernel_selftests.powerpc/alignment:alignment_handler')
 Waiting for pid 23258 for 1800 seconds
 System python is too old, crash handling disabled
 Running 'make run_tests -C powerpc/alignment TEST_PROGS=alignment_handler TEST_GEN_PROGS='' TEST_CUSTOM_PROGS='''
 [stdout] make: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/powerpc/alignment'
 [stdout] TAP version 13
 [stdout] 1..1
 [stdout] # timeout set to 45
 [stdout] # selftests: powerpc/alignment: alignment_handler
 [stdout] # test: test_alignment_handler_vsx_206
 [stdout] # tags: git_version:unknown
 [stdout] # VSX: 2.06B
 [stdout] # Doing lxvd2x: PASSED
 Timer expired (1800 sec.), nuking pid 23258

I assume there is a leftover process that cause sut-test failure in the end. This will need to be investigated manually.

[Po-Hsu Lin (cypressyew)]

For mantic, we already have this hinted, just without a proper bug report.

This issue pops up again I think it's because we have it added back to the pool recently since 2024.04.01.