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[Koichiro Den <1945949@xxxxxxxxxxxxxxxxxx>]

aio_dio_bugs/src/aio-dio-extend-stat.c is not maintained for about 17
years. It incorrectly defines __USE_GNU (instead of _GNU_SOURCE) at the
top and sets O_DIRECT as 040000 even on arm64. I believe this is not
worth fixing; it existed for verifying a fix for an ancient bug. Should
we just drop aio-dio-extend-stat?

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https://bugs.launchpad.net/bugs/1945949

Title:
  aio_dio_bugs.aio-dio-extend-stat can fail to open test file on linux-
  aws 5.13 ARM64

Status in ubuntu-kernel-tests:
  New

Bug description:
  aio_dio_bugs can fail with the following error on linux-aws (5.13 - even if this error is present since 5.8) ARM64 instances:
    * a1.medium
    * a1.metal
    * c6g.8xlarge

  With:
          11:10:09 DEBUG| Persistent state client._record_indent now set to 2
          11:10:09 DEBUG| Persistent state client.unexpected_reboot now set to ('aio_dio_bugs.aio-dio-extend-stat', 'aio_dio_bugs.aio-dio-extend-stat')
          11:10:09 DEBUG| Waiting for pid 8727 for 600 seconds 
          11:10:09 WARNI| System python is too old, crash handling disabled
          11:10:09 DEBUG| Running 'LD_LIBRARY_PATH=/home/ubuntu/autotest/client/deps/libaio/lib/ /home/ubuntu/autotest/client/tmp/aio_dio_bugs/src/aio-dio-extend-stat file'
          11:10:09 DEBUG| [stdout] failed to open test file file, errno: 20
          11:10:09 ERROR| Exception escaping from test:
          Traceback (most recent call last):
            File "/home/ubuntu/autotest/client/shared/test.py", line 411, in _exec
              _call_test_function(self.execute, *p_args, **p_dargs)
            File "/home/ubuntu/autotest/client/shared/test.py", line 823, in _call_test_function
              return func(*args, **dargs)
            File "/home/ubuntu/autotest/client/shared/test.py", line 291, in execute 
              postprocess_profiled_run, args, dargs)
            File "/home/ubuntu/autotest/client/shared/test.py", line 212, in _call_run_once
              self.run_once(*args, **dargs)
            File "/home/ubuntu/autotest/client/tests/aio_dio_bugs/aio_dio_bugs.py", line 47, in run_once
              utils.system(var_ld_path + ' ' + cmd)
            File "/home/ubuntu/autotest/client/shared/utils.py", line 1232, in system
              verbose=verbose).exit_status
            File "/home/ubuntu/autotest/client/shared/utils.py", line 918, in run
              "Command returned non-zero exit status")
          CmdError: Command  failed, rc=1, Command returned non-zero exit status
          * Command:
              LD_LIBRARY_PATH=/home/ubuntu/autotest/client/deps/libaio/lib/
              /home/ubuntu/autotest/client/tmp/aio_dio_bugs/src/aio-dio-extend-stat file
          Exit status: 1
          Duration: 0.0117130279541

  
  It might be a race in the test, more than a kernel bug, but it's worth investigating.

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