Re: [ANNOUNCE] 3.0.4-rt13

Peter Zijlstra
2011-09-13T16:14:14Z

On Tue, 2011-09-13 at 17:28 +0200, Mike Galbraith wrote:
> On Tue, 2011-09-13 at 17:08 +0200, Peter Zijlstra wrote:
> > On Tue, 2011-09-13 at 15:36 +0200, Peter Zijlstra wrote:
> > > Does the below cure things? It breaks !rt builds, but we can cure that
> > > if it works..
> >
> > n/m its broken like hell..
>
> Since this seems to be a legitimate need for a non-preemptive wakeup,
> how about we [re]create one to get rid of abuse? (otoh, that would add
> a branch everywhere.. btdt a couple times, always ended up tossing it)

Nah, we absolutely need to kill that preempt_disable/enable stuff in
there, it covers an O(n^2) loop, its complete crap.

Just need to wrap my head around that code..