Re: [PATCH RT] rt,ipc,sem: fix -rt livelock

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On Fri, 13 Sep 2013 05:20:21 +0200
Mike Galbraith <bitbucket@xxxxxxxxx> wrote:

> On Thu, 2013-09-12 at 15:15 -0400, Steven Rostedt wrote: 
> > On Thu, 12 Sep 2013 09:40:28 +0200
> > Mike Galbraith <bitbucket@xxxxxxxxx> wrote:
> > 
> > 
> > > If maintainers are interested, I can add that and clean up hammer marks
> > > so it can be applied in lieu of the existing rt wakeup patch instead of
> > > being crammed in on top of it, or they can trivially do that themselves,
> > > both options presuming your (implied) approval.
> > > 
> > 
> > Mike,
> > 
> > What's the final patch for this?
> 
> Both loop removal patch or something like it (but prettier), and
> Manfred's wakeup scheme to prevent the locked array lock being being
> seen and reacted to by wakees, who can then contend on that lock,
> defeating the whole purpose for a while.
> 
> > Could you post another one with what you believe is the correct fix.
> 
> As noted, I _think_ they're both needed.  

Can you repost as a patch series please.

Thanks,

-- Steve
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