Re: [RFC PATCH v2 0/7] Tunable sched_mc_power_savings=n

[Andi Kleen]

> 1. Detailed documentation

Messy code cannot be really made good with documentation. It's
not that your patches are that messy, it's more that it makes
something already overcomplicated even worse.

> 2. Cleanup the group_min and group_leader stuff in
>    find_busiest_group()

I think one issue is that there are general too many special cases
that completely change the algorithm especially for power saving.
Perhaps it would make sense to refactor the code a bit and then
use different high level code paths for those?  I assume that
would make it all simpler and easier to understand.

The other alternative would be to dynamically change the domains
so that a generic graph walker without knowledge of power savings
could DTRT in all cases. But I assume that would be much harder.

-Andi


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