cgroup: Add named hierarchy disabling to cgroup_no_v1 boot param (3fc9c12d) · Commits · 戴 / test

Documentation/admin-guide/kernel-parameters.txt

+6 −2

Original line number	Diff line number	Diff line
		@@ -486,10 +486,14 @@
		cut the overhead, others just disable the usage. So
		only cgroup_disable=memory is actually worthy}

		cgroup_no_v1= [KNL] Disable one, multiple, all cgroup controllers in v1
		Format: { controller[,controller...] \| "all" }
		cgroup_no_v1= [KNL] Disable cgroup controllers and named hierarchies in v1
		Format: { { controller \| "all" \| "named" }
		[,{ controller \| "all" \| "named" }...] }
		Like cgroup_disable, but only applies to cgroup v1;
		the blacklisted controllers remain available in cgroup2.
		"all" blacklists all controllers and "named" disables
		named mounts. Specifying both "all" and "named" disables
		all v1 hierarchies.

		cgroup.memory= [KNL] Pass options to the cgroup memory controller.
		Format: <string>

+13 −1

Original line number	Diff line number	Diff line
		@@ -27,6 +27,9 @@
		/* Controllers blocked by the commandline in v1 */
		static u16 cgroup_no_v1_mask;

		/* disable named v1 mounts */
		static bool cgroup_no_v1_named;

		/*
		* pidlist destructions need to be flushed on cgroup destruction. Use a
		* separate workqueue as flush domain.
		@@ -963,6 +966,10 @@ static int parse_cgroupfs_options(char data, struct cgroup_sb_opts opts)
		}
		if (!strncmp(token, "name=", 5)) {
		const char *name = token + 5;

		/* blocked by boot param? */
		if (cgroup_no_v1_named)
		return -ENOENT;
		/* Can't specify an empty name */
		if (!strlen(name))
		return -EINVAL;
		@@ -1292,7 +1299,12 @@ static int __init cgroup_no_v1(char *str)

		if (!strcmp(token, "all")) {
		cgroup_no_v1_mask = U16_MAX;
		break;
		continue;
		}

		if (!strcmp(token, "named")) {
		cgroup_no_v1_named = true;
		continue;
		}

		for_each_subsys(ss, i) {