On Fri, 3 Jul 2015, Vince Weaver wrote:

> On Thu, 2 Jul 2015, Ingo Molnar wrote:
> 
> > 
> > * Vince Weaver <[email protected]> wrote:
> > 
> > > I'm also still getting a lot of 
> > >   perfevents: irq loop stuck!
> > > messages, I thought the workaround for that had gone in for 4.2 but I 
> > > guess not.
> > 
> > Hm, so I was waiting for your feedback regarding the precise period cutoff 
> > to use, 
> > and I guess that's where the patch got lost.
> > 
> > Does the value of 2 below work for you?
> 
> I still get the messages when using 2.  I'll see if I can narrow down the 
> cutoff.  I know the messages definitely go away when using 128.

>From what I can tell, a value of 2 will still generate "irq loop stuck", 
but 3 appears to be safe, but I'm still fuzzing to be sure.  Previously I 
ran a kernel with 5 for a while and that also did not generate any 
messages.

Vince


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