Re: [PATCH 2/4] timer: relax tick stop in idle entry

Arjan van de Ven
2015-11-16T23:32:41Z

On 11/16/2015 3:28 PM, Paul E. McKenney wrote:

> Is this mostly an special-purpose embedded thing, or do you expect distros
> to be enabling this? If the former, I suggest CONFIG_RCU_NOCB_CPU_ALL,
> but if distros are doing this for general-purpose workloads, I instead
> suggest CONFIG_RCU_FAST_NO_HZ.

thermal overload happens a lot on small devices, but sadly also in big datacenters
where it is not uncommon to underprovision cooling capacity by a bit
(it's one of those "99% of the time you only need THIS much, the 1% you need 30% more"
and that more is expensive or even impractical)