Re: [PATCH 0/9] Per-cgroup /proc/stat

[Peter Zijlstra]

On Mon, 2011-09-19 at 16:07 -0700, Paul Turner wrote:
> At that point we could !CONFIG_CGROUP_CPUACCT by default and deprecate 
> the beast without breaking ABI for those who really need it (either 
> because their applications have hard-coded paths or because they really 
> like cgroup user/sys time -- which we COULD duplicate into cpu but I'm 
> inclined not to).
> 
> [*]: the only real caveat is how loudly people scream about the code 
> duplication; I think it's worth it if it let's us kill cpuacct in the 
> long run. 

Right so this patch is all about extended the stat crap, so that would
have to be duplicated as well.

IIRC the reason cpuacct is a separate controller, is that it then
doesn't add the overhead it incurs to the regular cpu controller.

But I figure we could add some control knobs on the cpu cgroup mount to
enable/disable certain features.

Having two separate cgroup hierarchies for the scheduler is quite daft
of course.
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