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test: don't use `-cpu max` in GH Actions 

There appears to be an issue with newer QEMU versions (spotted with Arch
Linux and C9S containers) which causes the respective GH Action to hang
when booting a QEMU VM in combination with the `-cpu max` parameter.

During (a particularly painful) debugging session I once managed to get
some output from such "frozen" machine (using `earlycon` and
`earlyprintk` kernel cmdline options), and in that particular case the
VM died with a trap caused by an invalid opcode.

I couldn't reproduce this locally, only in GH Actions environment with
Arch Linux and C9S containers. Also, so far I haven't found out which
specific CPUID flag causes this, but using the `IvyBridge-v2` feature
set seems to mitigate the issue.
master
Frantisek Sumsal 2021-11-12 21:43:12 +01:00 committed by Jóhann B. Guðmundsson
parent 5c2f72f152
commit 3f56d481e8
2 changed files with 4 additions and 2 deletions
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5
test/run-qemu
View File

@ -3,13 +3,14 @@
# We prefer kvm, kqemu, userspace in that order. # We prefer kvm, kqemu, userspace in that order.


export PATH=/usr/sbin:/usr/bin:/sbin:/bin export PATH=/usr/sbin:/usr/bin:/sbin:/bin
QEMU_CPU="${QEMU_CPU:-max}"


[[ -x /usr/bin/qemu ]] && BIN=/usr/bin/qemu && ARGS=(-cpu max) [[ -x /usr/bin/qemu ]] && BIN=/usr/bin/qemu && ARGS=(-cpu "$QEMU_CPU")
(lsmod | grep -q '^kqemu ') && BIN=/usr/bin/qemu && ARGS=(-kernel-kqemu -cpu host) (lsmod | grep -q '^kqemu ') && BIN=/usr/bin/qemu && ARGS=(-kernel-kqemu -cpu host)
[[ -c /dev/kvm && -x /usr/bin/kvm ]] && BIN=/usr/bin/kvm && ARGS=(-cpu host) [[ -c /dev/kvm && -x /usr/bin/kvm ]] && BIN=/usr/bin/kvm && ARGS=(-cpu host)
[[ -c /dev/kvm && -x /usr/bin/qemu-kvm ]] && BIN=/usr/bin/qemu-kvm && ARGS=(-cpu host) [[ -c /dev/kvm && -x /usr/bin/qemu-kvm ]] && BIN=/usr/bin/qemu-kvm && ARGS=(-cpu host)
[[ -c /dev/kvm && -x /usr/libexec/qemu-kvm ]] && BIN=/usr/libexec/qemu-kvm && ARGS=(-cpu host) [[ -c /dev/kvm && -x /usr/libexec/qemu-kvm ]] && BIN=/usr/libexec/qemu-kvm && ARGS=(-cpu host)
[[ -x /usr/bin/qemu-system-$(uname -m) ]] && BIN=/usr/bin/qemu-system-$(uname -m) && ARGS=(-cpu max) [[ -x /usr/bin/qemu-system-$(uname -m) ]] && BIN=/usr/bin/qemu-system-$(uname -m) && ARGS=(-cpu "$QEMU_CPU")
[[ -c /dev/kvm && -x /usr/bin/qemu-system-$(uname -m) ]] && BIN=/usr/bin/qemu-system-$(uname -m) && ARGS=(-enable-kvm -cpu host) [[ -c /dev/kvm && -x /usr/bin/qemu-system-$(uname -m) ]] && BIN=/usr/bin/qemu-system-$(uname -m) && ARGS=(-enable-kvm -cpu host)


[[ $BIN ]] || { [[ $BIN ]] || {

1
tools/test-github.sh
View File

@ -41,6 +41,7 @@ else
cd /lib/modules cd /lib/modules
ls -1 | tail -1 ls -1 | tail -1
)" \ )" \
QEMU_CPU="IvyBridge-v2" \
DRACUT_NO_XATTR=1 \ DRACUT_NO_XATTR=1 \
TEST_RUN_ID="$RUN_ID" \ TEST_RUN_ID="$RUN_ID" \
${TESTS:+TESTS="$TESTS"} \ ${TESTS:+TESTS="$TESTS"} \