Attachment 578035 Details for Bug 813228 – simplified script

simplified script

cpusets.sh (text/plain), 1.42 KB, created by Michal Schmidt on 2012-04-17 13:36:36 UTC

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Creator: Michal Schmidt

Created: 2012-04-17 13:36:36 UTC

Size: 1.42 KB

patch

obsolete

>#!/bin/bash
># Script to save and restore the cpusets' cpu configuration after a
># suspend/resume cycle.
># This is a workaround for a Linux kernel bug which results in cpusets
># being reduced to a single cpu (boot cpu) after a suspend/resume
># cycle:
># https://bugzilla.redhat.com/show_bug.cgi?id=714271
># Workaround requested in:
># https://bugzilla.redhat.com/show_bug.cgi?id=813228
>#
># Author: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
># 16 March 2012
># Simplified by Michal Schmidt
>
>SAVEFILE=/run/ugly-hack-for-bz813228-saved_cpusets.txt
>
>save_cpusets()
>{
>	# Omit the root cpuset (using mindepth parameter) since it is read-only
>	# (and will be restored properly after resume by the kernel itself).
>
>	# Parent directories must be processed before children otherwise the
>	# hierarchy is not preserved and restore_cpusets() will have trouble
>	# restoring the cpusets.
>	# This is because of the rule that a child cpuset cannot have a cpu that
>	# is not present in its parent cpuset.
>
>	find -L /sys/fs/cgroup/cpuset -mindepth 2 -type d | while read cspath; do
>		cspath=$cspath/cpuset.cpus
>		read cpus < $cspath
>		echo "$cspath $cpus"
>	done > $SAVEFILE
>}
>
>restore_cpusets()
>{
>	while read cspath cpus; do
>		echo "$cpus" > $cspath
>	done < $SAVEFILE
>
>	rm -f $SAVEFILE
>}
>
>case "$1" in
>        suspend|hibernate)
>                save_cpusets
>                ;;
>        resume|thaw)
>                restore_cpusets
>                ;;
>esac
>
>exit $?
>

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Attachments on bug 813228: 577965 | 578035