On Tue, Jun 10, 2014 at 11:06:41AM +0100, Morten Rasmussen wrote: > How would you like to disable the energy stuff for users for whom > latency is everything? > > I mean, we are adding some extra load/utilization tracking. While I > think we should do everything possible to minimize the overhead, I think > it is unrealistic to assume that it will be zero. Is a some extra 'if > (energy_enabled)' acceptable? > > I'm open for other suggestions.
We have the jump-label stuff to do self modifying code ;-) The only
thing we need to be careful with is data-layout.
So I'm _hoping_ we can do all this without more CONFIG knobs, because
{PREEMPT*SMP*CGROUP^3*NUMA^2} is already entirely annoying to
build and run test, not to mention that distro builds will have no other
option than to enable everything anyhow.
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