[Bug 289902] usr.bin/tail/tail_test:follow_rename test fails intermittently on aarch64 in CI

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=289902

            Bug ID: 289902
           Summary: usr.bin/tail/tail_test:follow_rename test fails
                    intermittently on aarch64 in CI
           Product: Base System
           Version: 16.0-CURRENT
          Hardware: arm64
                OS: Any
            Status: New
          Keywords: regression
          Severity: Affects Only Me
          Priority: ---
         Component: tests
          Assignee: markj@FreeBSD.org
          Reporter: me@svmhdvn.name
                CC: testing@FreeBSD.org

Created attachment 264155
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=264155&action=edit
kyua test report

The 'usr.bin/tail/tail_test:follow_rename' testcase fails intermittently on
aarch64 in CI:


===> usr.bin/tail/tail_test:follow_rename
Result:     failed: atf-check failed; see the output of the test for details

Standard output:
Executing command [ mv infile infile_old ]
Executing command [ mv infile_new infile ]
Executing command [ cmp expectfile outfile ]

Standard error:
Fail: incorrect exit status: 1, expected: 0
stdout:
expectfile outfile differ: char 1, line 1

stderr:

Files left in work directory after failure: expectfile, infile, infile_old,
outfile


I have reproduced this error using Bricoler with 100 runs for good measure and
attached the failing test report in this bug:

$ bricoler run freebsd-src-regression-suite --param freebsd-src:url=/usr/src
--param freebsd-src:branch= --param
freebsd-src-regression-suite:hypervisor=bhyve --param
freebsd-src-regression-suite:memory=4096 --param
freebsd-src-regression-suite:ncpus=2 --param
freebsd-src-regression-suite:parallelism=1 --param
freebsd-src-regression-suite:count=100 --param
freebsd-src-regression-suite:tests='usr.bin/tail/tail_test:follow_rename'

@markj, since you added the tests in
https://cgit.freebsd.org/src/commit/?id=58b1a126b98f9d64f30246c90d6c049fd78dda6b
(tail: Add regression tests for -f and -F), please triage as necessary.

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