Re: Severe performance regression w/ 4.4+ on Android due to cgroup locking changes

[Paul E. McKenney]

On Wed, Jul 13, 2016 at 10:57:12PM +0200, Peter Zijlstra wrote:
> On Wed, Jul 13, 2016 at 01:52:11PM -0700, Paul E. McKenney wrote:
> > Not a particularly real-time-friendly fix, but certainly a good check
> > on our various assumptions.
> 
> Not only RT, but also HPC and all the other RDMA userspace polling
> freaks ;-)

If Tejun's lglock-like approach doesn't pan out, then it would quite
easy to make a boot parameter that selected expedited vs. non-expedited
behavior.

							Thanx, Paul