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Subject[PATCH v2 00/14] per-cgroup /proc/stat

This is a new shot of the per-cgroup /proc/stat series.
I believe this series is a huge improvement over the last one.
Basically, there is a control file in the root cgroup that controls
wether or not statistics will be collected in a per-cgroup fashion.
Only when this is on, a jump label is enabled allowing the "run to parent"
to happen. The parent cgroup's kstat is coincident with the system-wide kstat,
so we don't need special code for when cgroups-disabled, either runtime or
compile time.

cpuusage and cpuacct statistics are now also available in the cpu cgroup.
Since the task_group structure is already walked by the scheduler anyway,
by keeping everything in the same cgroup, we avoid multiple walks.

I also have a follow up patch that displays the information in this file
automatically in /proc/stat when requested, but I am not including in
this series. I'd like to give some second thoughts about that: Since I
am pretty stubborn, I haven't yet given up on coming up with a way to
tie namespaces and cgroups together in a good fashion for theses cases.

Glauber Costa (14):
trivial: initialize root cgroup's sibling list
Change cpustat fields to an array.
Move /proc/stat logic inside sched.c
split kernel stat in two
Display /proc/stat information per cgroup
Make total_forks per-cgroup
per-cgroup boot time
Report steal time for cgroup
Keep nr_iowait per cgroup
Keep number of context switches per-cgroup
provide a version of cpuacct statistics inside cpu cgroup
Keep number of running processes per-cgroup
provide a version of cpuusage statistics inside cpu cgroup
Change CPUACCT to default n

Documentation/feature-removal-schedule.txt | 8 +
arch/s390/appldata/appldata_os.c | 18 +-
arch/x86/include/asm/i387.h | 2 +-
drivers/cpufreq/cpufreq_conservative.c | 33 +-
drivers/cpufreq/cpufreq_ondemand.c | 33 +-
drivers/macintosh/rack-meter.c | 8 +-
fs/proc/stat.c | 144 +------
fs/proc/uptime.c | 8 +-
include/linux/kernel_stat.h | 56 ++-
include/linux/sched.h | 5 +
init/Kconfig | 1 +
kernel/fork.c | 7 +-
kernel/sched.c | 660 +++++++++++++++++++++++++---
kernel/sched_debug.c | 3 +-
kernel/sched_fair.c | 10 +
kernel/sched_rt.c | 4 +
16 files changed, 731 insertions(+), 269 deletions(-)


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