Re: fast path cycle muncher (vmstat: make vmstat_updater deferrable again and shut down on idle)

[Mike Galbraith]

On Tue, 2016-01-26 at 12:34 -0600, Christoph Lameter wrote:
> On Tue, 26 Jan 2016, Mike Galbraith wrote:
> 
> > I disagree.  You're burning electrons for no benefit at all to me on my
> > box.  You want to do high speed trading, that's fine, but I expect my
> > box to be able to pop in and out of idle without having to pay a toll
> > to the high speed trading bandits of the world, thank you very much.
> > 
> > This specialty thing does not belong in the generic fast path.
> 
> The system going idle is a fastpath. Mind boogling.

Hohum, noted.  Now what about those cycles, and the sleeping lock you
injected for -rt?

	-Mike