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Merge pull request #1771 from flatcar/scripts

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sys-fs/multipath-tools: Disable realtime scheduling for multipathd

Signed-off-by: Jeremi Piotrowski <jpiotrowski@microsoft.com>
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Jeremi Piotrowski 2024-03-19 17:41:06 +01:00
commit 1fb7528e5f
2 changed files with 14 additions and 0 deletions
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changelog/changes/2024-03-19-multipath.md Normal file
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- Disabled real-time priority for multipathd as it prevents the cgroups2 cpu controller from working. ([flatcar/scripts#1771](https://github.com/flatcar/scripts/pull/1771))

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sdk_container/src/third_party/coreos-overlay/coreos/config/env/sys-fs/multipath-tools vendored Normal file
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cros_post_src_install_add_dropin() {
mkdir -p "${D}$(systemd_get_systemunitdir)/multipathd.service.d"
cat <<EOF >"${D}$(systemd_get_systemunitdir)/multipathd.service.d/flatcar.conf"
[Service]
# Multipathd sets itself to sched_rr with highest priority.
# Cgroups2 doesn't support realtime processes outside the root cgroup,
# if any such process exists then cpu controller can't be enabled.
# This poses a bit of a dilemma.
# Block realtime control for the process, but give it highest non-rt priority.
RestrictRealtime=yes
Nice=-20
EOF
}