Hi, As we have been extensively discussing, the cost and pain points for cgroups come from many places. But at least one of those is the arbitrary nature of hierarchies. Many people, including at least Tejun and me would like this to go away altogether. Problem so far, is breaking compatiblity with existing setups I am proposing here a default-n Kconfig option that will guarantee that the cpu cgroups (for now) will be comounted. I started with them because the cpu/cpuacct division is clearly the worst offender. Also, the default-n is here so distributions will have time to adapt: Forcing this flag to be on without userspace changes will just lead to cgroups failing to mount, which we don't want. Although I've tested it and it works, I haven't compile-tested all possible config combinations. So this is mostly for your eyes. If this gets traction, I'll submit it properly, along with any changes that you might require. Thanks. Glauber Costa (5): cgroup: allow some comounts to be forced. sched: adjust exec_clock to use it as cpu usage metric sched: do not call cpuacct_charge when cpu and cpuacct are comounted cpuacct: do not gather cpuacct statistics when not mounted sched: add cpusets to comounts list include/linux/cgroup.h | 6 ++ init/Kconfig | 23 ++++++++ kernel/cgroup.c | 29 +++++++++- kernel/cpuset.c | 4 ++ kernel/sched/core.c | 149 +++++++++++++++++++++++++++++++++++++++++++++---- kernel/sched/rt.c | 1 + kernel/sched/sched.h | 20 ++++++- 7 files changed, 220 insertions(+), 12 deletions(-) -- 1.7.11.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>