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Skip fork_hosted test on multi-CPU VM runs #1712

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Merged
Sangho Lee (sangho2) merged 1 commit into from
Oct 23, 2026
Merged

Skip fork_hosted test on multi-CPU VM runs #1712

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11 changes: 10 additions & 1 deletion dev_tools/run_linux_on_vm_userland.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -42,7 +42,9 @@
# passing tests with concurrent runs, the other CPUs ran none (a smoke check,
# for the other CPUs running nothing at all). With more than
# 4, the preempt test is skipped: it checks preemption with 8 CPU-bound
# programs. Both need QEMU_SMP to start with the CPU count, or to have cpus=.
# programs. With more than 1, the fork_hosted test is skipped: it is flaky
# there (a fork bug, to be fixed). These need QEMU_SMP to start with the CPU
# count, or to have cpus=.
#
# Usage: dev_tools/run_linux_on_vm_userland.sh [-t <test>]... [-r] [-v]
# -t test to run, e.g. hello (repeatable; default: every test)
Expand Down Expand Up @@ -226,6 +228,13 @@ for t in "${tests[@]}"; do
skipped=$((skipped + 1))
continue
fi
# TODO: run it again once the fork bug that makes it flaky with more
# than 1 CPU is fixed.
if [[ $t == fork_hosted && ${smp:-1} -gt 1 ]]; then
echo "SKIP $t (flaky with more than 1 CPU: see the header)"
skipped=$((skipped + 1))
continue
fi
mkdir -p "$WORK/$t"
cp "$USERLAND" "$WORK/$t/runner.elf"
cp "$WORK/rootfs.tar" "$WORK/$t/rootfs.tar"
Expand Down
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