FreeBSD-main-amd64-test - Build #22777 - Still Unstable

FreeBSD-main-amd64-test - Build #22777 (9af32ef5643bf35e1a2687269f2339dfb007ef36) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/22777/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/22777/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/22777/console

Status explanation:
"Unstable" - some tests are suspected being broken by the following changes
"Still Unstable" - the failing test cases have not been fixed by these
                   following changes and this is a notification to note that
                   these changes have not been fully tested by the CI system

Change summaries:
(Those commits are likely but not certainly responsible)

9af32ef5643bf35e1a2687269f2339dfb007ef36 by cperciva:
vtblk: Bypass iommu on powerpc



The failed test cases:

7 tests failed.
FAILED:  sys.netpfil.common.dummynet.pf_queue

Error Message:
We failed prioritisation 1 times

FAILED:  lib.libc.time.mktime_test.timegm_epoch

Error Message:
/usr/src/contrib/netbsd-tests/lib/libc/time/t_mktime.c:98: Expected errno 0, got 84, in t == (time_t)0

FAILED:  sys.net.if_tun_test.235704

Error Message:
atf-check failed; see the output of the test for details

FAILED:  usr.sbin.etcupdate.preworld_test.main

Error Message:
Returned non-success exit status 1

FAILED:  sys.aio.aio_test.aio_socket_blocking_short_write

Error Message:
Test case body timed out

FAILED:  sys.aio.aio_test.aio_socket_blocking_short_write_vectored

Error Message:
Test case body timed out

FAILED:  sys.aio.aio_test.aio_socket_short_write_cancel

Error Message:
/usr/src/tests/sys/aio/aio_test.c:1396: aio_error(&iocb) == EINPROGRESS not met