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overlay coreos/config: Amend disabling real-time scheduling in sys-fs/multipath-tools

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Signed-off-by: Krzesimir Nowak <knowak@microsoft.com>
This commit is contained in:
Krzesimir Nowak 2026-04-01 17:49:19 +02:00
parent 328e7717ba
commit 35760e1004
1 changed files with 6 additions and 6 deletions
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12
sdk_container/src/third_party/coreos-overlay/coreos/config/env/sys-fs/multipath-tools vendored
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@ -2,12 +2,12 @@ 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,
# Set LimitRTPRIO to zero to tell multipathd to not even attempt
# enabling the real-time scheduling. We do this, because cgroups2
# doesn't support real-time 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
# Upstream unit already sets CPUWeight to 1000 to have a sufficient
# priority in case of normal scheduling.
LimitRTPRIO=0
EOF
}