added optional cpuset accounting

[rrq/overlay-boot.git] / functions

diff --git a/functions b/functions
index 2cc9639ad68c7f97455b404321dcf211c07d490f..bc65448082cb4c697df37d2d6f8e82f2bc5a5a4f 100644 (file)
--- a/functions
+++ b/functions
@@ -166,3 +166,14 @@ is_live() {
 list_running() {
     pgrep -a overlay-boot | awk '{print $4}'
 }
+
+# Start cgroup v2 cpuset accounting if enabled.
+# Needs manual enabling, with:
+#    mount -t cgroup2 cgroup2 /sys/fs/cgroup
+setup_cgroup2_accounting() {
+    local NAME="$1" ME="$2"
+    local ACCDIR="$(awk '$3 == "cgroup2" {print $2; exit}' /proc/mounts)"
+    [ -z "$ACCDIR" ] && return 0
+    mkdir -p "$ACCDIR/$NAME"
+    echo "$ME" > $ACCDIR/$NAME/cgroup.procs
+}