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shutils: look for an exact match of a cgroup

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When running a command into a cgroup we want to make sure that the command is
only run inside the intended cgroup. If there is a hierarchy of cgroups named
with a common prefix, the script will move it to all matching cgroup and as a
result the task will end up running always at lowest level. For example, if we
have the following hierarchy of cgroups:

  "/"
   |__ "/tg1"
         |__ "/tg1/tg1_1"

and we want to run something in cgroup "/tg1/", the lowest levels will match the
regexp and the task will ultimately be moved to "/tg1/tg1_1".

This patch fixes the issue by requiring the absolute path of the specified
cgroup to match exactly.
This commit is contained in:
Michele Di Giorgio 2017-11-16 18:26:29 +00:00 committed by marcbonnici
parent 02384615dd
commit f3b04fcd73
1 changed files with 1 additions and 1 deletions
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2
devlib/bin/scripts/shutils.in
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@ -131,7 +131,7 @@ cgroups_run_into() {
fi
$FIND $CGMOUNT -type d -mindepth 1 | \
$GREP "$CGP" | \
$GREP -e "^$CGMOUNT$CGP$" | \
while read CGPATH; do
# Move this shell into that control group
echo $$ > $CGPATH/cgroup.procs