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systemd/80-hotplug-cpu-mem.rules

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# do not edit this file, it will be overwritten on update
#
# Hotplug physical CPU
#
SUBSYSTEM=="cpu", ACTION=="add", TEST=="online", ATTR{online}=="0", ATTR{online}="1"
#
# Hotplug physical memory. Instances of tmpfs are remounted so their
# size are recalculated. This might be needed if some sizes were
# specified relative to the total amount of memory (boo#869603). For
# now make it simple and remount all tmpfs regardless of how their
# size are specified. It should be handled by the kernel as it has a
# lot of shortcomings anyways (tmpfs mounted by other processes, mount
# namespaces, ...)
#
SUBSYSTEM=="memory", ACTION=="add", PROGRAM=="/usr/bin/systemd-detect-virt", RESULT!="zvm", ATTR{state}=="offline", \
ATTR{state}="online", \
RUN+="/bin/sh -c ' \
while read src dst fs opts unused; do \
case $fs in \
tmpfs) mount -o remount \"$dst\" ;; \
esac \
done </proc/self/mounts"