cpuacct is the only user of cgroup_subsys.active flag. The flag is needed because cpuacct_charge() and cpuacct_account_field() can be called when cpuacct hasn't been initialized during system bootup. This patch initializes cpuacct earlier, and the result is we don't have to check the flag in scheduler hot path. Note, this patchset is based on "[PATCH 0/7] sched: Split cpuacct" (just because there're code conflicts) http://lkml.org/lkml/2013/3/28/1 0001-cpuacct-allocate-per_cpu-cpuusage-for-root-cpuacct-s.patch 0002-cpuacct-Initialize-root-cpuacct-earlier.patch 0003-cpuacct-Initialize-cpuacct-subsystem-earlier.patch 0004-cpuacct-No-need-to-check-subsys-active-state.patch 0005-cgroup-Remove-subsys.active-flag.patch -- include/linux/cgroup.h | 1 - kernel/cgroup.c | 3 --- kernel/sched/core.c | 2 -- kernel/sched/cpuacct.c | 30 +++++++++++------------------- kernel/sched/cpuacct.h | 5 ----- 5 files changed, 11 insertions(+), 30 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
