cgroup/cpuset: Expose cpuset.cpus.isolated

The root-only cpuset.cpus.isolated control file shows the current set
of isolated CPUs in isolated partitions. This control file is currently
exposed only with the cgroup_debug boot command line option which also
adds the ".__DEBUG__." prefix. This is actually a useful control file if
users want to find out which CPUs are currently in an isolated state by
the cpuset controller. Remove CFTYPE_DEBUG flag for this control file and
make it available by default without any prefix.

The test_cpuset_prs.sh test script and the cgroup-v2.rst documentation
file are also updated accordingly. Minor code change is also made in
test_cpuset_prs.sh to avoid false test failure when running on debug
kernel.

Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

This commit is contained in:

Waiman Long

2023-11-27 14:51:05 -05:00

committed by

Tejun Heo

parent 2025956639

commit 877c737db9

3 changed files with 26 additions and 15 deletions

									
										kernel/cgroup/cpuset.c
									
		+1
		-1
	
												View File
												
				@@ -3974,7 +3974,7 @@ static struct cftype dfl_files[] = {

						.name = "cpus.isolated",

						.seq_show = cpuset_common_seq_show,

						.private = FILE_ISOLATED_CPULIST,

						.flags = CFTYPE_ONLY_ON_ROOT | CFTYPE_DEBUG,

						.flags = CFTYPE_ONLY_ON_ROOT,

					},

					{ }	/* terminate */