cgroup v2: Don't require CPU controller for CPU accounting in 4.15+

systemd only uses functions that are as of Linux 4.15+ provided
externally to the CPU controller (currently usage_usec), so if we have a
new enough kernel, we don't need to set CGROUP_MASK_CPU for
CPUAccounting=true as the CPU controller does not need to necessarily be
enabled in this case.

Part of this patch is modelled on an earlier patch by Ryutaroh Matsumoto
(see PR #9665).

This commit is contained in:

Chris Down

2018-11-18 12:21:41 +00:00

parent 4472fa6d2c

commit f98c25850f

6 changed files with 105 additions and 32 deletions

									
										test/daughter.service
									
		+1
		
												View File
												
				@@ -5,3 +5,4 @@ Description=Daughter Service

				Slice=parent.slice

				Type=oneshot

				ExecStart=/bin/true

				CPUAccounting=true