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#!/usr/bin/env bash
# SPDX-License-Identifier: LGPL-2.1-or-later
set -eux
set -o pipefail
# shellcheck source=test/units/util.sh
. "$(dirname "$0")"/util.sh
systemd-analyze log-level debug
# Ensure that the init.scope.d drop-in is applied on boot
test "$(cat /sys/fs/cgroup/init.scope/memory.high)" != "max"
# Loose checks to ensure the environment has the necessary features for systemd-oomd
[[ -e /proc/pressure ]] || echo "no PSI" >>/skipped
[[ "$(get_cgroup_hierarchy)" == "unified" ]] || echo "no cgroupsv2" >>/skipped
[[ -x /usr/lib/systemd/systemd-oomd ]] || echo "no oomd" >>/skipped
if [[ -s /skipped ]]; then
exit 0
fi
rm -rf /run/systemd/system/testsuite-55-testbloat.service.d
# Activate swap file if we are in a VM
if systemd-detect-virt --vm --quiet; then
if [[ "$(findmnt -n -o FSTYPE /)" == btrfs ]]; then
btrfs filesystem mkswapfile -s 64M /swapfile
else
dd if=/dev/zero of=/swapfile bs=1M count=64
chmod 0600 /swapfile
mkswap /swapfile
fi
swapon /swapfile
swapon --show
fi
# Configure oomd explicitly to avoid conflicts with distro dropins
mkdir -p /run/systemd/oomd.conf.d/
cat >/run/systemd/oomd.conf.d/99-oomd-test.conf <<EOF
[OOM]
DefaultMemoryPressureDurationSec=2s
EOF
mkdir -p /run/systemd/system/-.slice.d/
cat >/run/systemd/system/-.slice.d/99-oomd-test.conf <<EOF
[Slice]
ManagedOOMSwap=auto
EOF
mkdir -p /run/systemd/system/user@.service.d/
cat >/run/systemd/system/user@.service.d/99-oomd-test.conf <<EOF
[Service]
ManagedOOMMemoryPressure=auto
ManagedOOMMemoryPressureLimit=0%
EOF
mkdir -p /run/systemd/system/systemd-oomd.service.d/
cat >/run/systemd/system/systemd-oomd.service.d/debug.conf <<EOF
[Service]
Environment=SYSTEMD_LOG_LEVEL=debug
EOF
systemctl daemon-reload
# enable the service to ensure dbus-org.freedesktop.oom1.service exists
# and D-Bus activation works
systemctl enable systemd-oomd.service
# if oomd is already running for some reasons, then restart it to make sure the above settings to be applied
if systemctl is-active systemd-oomd.service; then
systemctl restart systemd-oomd.service
fi
if [[ -v ASAN_OPTIONS || -v UBSAN_OPTIONS ]]; then
# If we're running with sanitizers, sd-executor might pull in quite a significant chunk of shared
# libraries, which in turn causes a lot of pressure that can put us in the front when sd-oomd decides to
# go on a killing spree. This fact is exacerbated further on Arch Linux which ships unstripped gcc-libs,
# so sd-executor pulls in over 30M of libs on startup. Let's make the MemoryHigh= limit a bit more
# generous when running with sanitizers to make the test happy.
mkdir -p /run/systemd/system/testsuite-55-testchill.service.d/
cat >/run/systemd/system/testsuite-55-testchill.service.d/99-MemoryHigh.conf <<EOF
[Service]
MemoryHigh=60M
EOF
# Do the same for the user instance as well
mkdir -p /run/systemd/user/
cp -rfv /run/systemd/system/testsuite-55-testchill.service.d/ /run/systemd/user/
else
# Ensure that we can start services even with a very low hard memory cap without oom-kills, but skip
# under sanitizers as they balloon memory usage.
systemd-run -t -p MemoryMax=10M -p MemorySwapMax=0 -p MemoryZSwapMax=0 /bin/true
fi
systemctl start testsuite-55-testchill.service
systemctl start testsuite-55-testbloat.service
# Verify systemd-oomd is monitoring the expected units
timeout 1m bash -xec 'until oomctl | grep "/testsuite-55-workload.slice"; do sleep 1; done'
oomctl | grep "/testsuite-55-workload.slice"
oomctl | grep "20.00%"
oomctl | grep "Default Memory Pressure Duration: 2s"
systemctl status testsuite-55-testchill.service
# systemd-oomd watches for elevated pressure for 2 seconds before acting.
# It can take time to build up pressure so either wait 2 minutes or for the service to fail.
for _ in {0..59}; do
if ! systemctl status testsuite-55-testbloat.service; then
break
fi
oomctl
sleep 2
done
# testbloat should be killed and testchill should be fine
if systemctl status testsuite-55-testbloat.service; then exit 42; fi
if ! systemctl status testsuite-55-testchill.service; then exit 24; fi
# Make sure we also work correctly on user units.
loginctl enable-linger testuser
systemctl start --machine "testuser@.host" --user testsuite-55-testchill.service
systemctl start --machine "testuser@.host" --user testsuite-55-testbloat.service
# Verify systemd-oomd is monitoring the expected units
# Try to avoid racing the oomctl output check by checking in a loop with a timeout
timeout 1m bash -xec 'until oomctl | grep "/testsuite-55-workload.slice"; do sleep 1; done'
oomctl | grep -E "/user.slice.*/testsuite-55-workload.slice"
oomctl | grep "20.00%"
oomctl | grep "Default Memory Pressure Duration: 2s"
systemctl --machine "testuser@.host" --user status testsuite-55-testchill.service
# systemd-oomd watches for elevated pressure for 2 seconds before acting.
# It can take time to build up pressure so either wait 2 minutes or for the service to fail.
for _ in {0..59}; do
if ! systemctl --machine "testuser@.host" --user status testsuite-55-testbloat.service; then
break
fi
oomctl
sleep 2
done
# testbloat should be killed and testchill should be fine
if systemctl --machine "testuser@.host" --user status testsuite-55-testbloat.service; then exit 42; fi
if ! systemctl --machine "testuser@.host" --user status testsuite-55-testchill.service; then exit 24; fi
loginctl disable-linger testuser
# only run this portion of the test if we can set xattrs
if cgroupfs_supports_user_xattrs; then
sleep 120 # wait for systemd-oomd kill cool down and elevated memory pressure to come down
mkdir -p /run/systemd/system/testsuite-55-testbloat.service.d/
cat >/run/systemd/system/testsuite-55-testbloat.service.d/override.conf <<EOF
[Service]
ManagedOOMPreference=avoid
EOF
systemctl daemon-reload
systemctl start testsuite-55-testchill.service
systemctl start testsuite-55-testmunch.service
systemctl start testsuite-55-testbloat.service
for _ in {0..59}; do
if ! systemctl status testsuite-55-testmunch.service; then
break
fi
oomctl
sleep 2
done
# testmunch should be killed since testbloat had the avoid xattr on it
if ! systemctl status testsuite-55-testbloat.service; then exit 25; fi
if systemctl status testsuite-55-testmunch.service; then exit 43; fi
if ! systemctl status testsuite-55-testchill.service; then exit 24; fi
fi
systemd-analyze log-level info
touch /testok
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