Re: 2.5.69 Interrupt Latency

[Greg KH]

On Tue, May 13, 2003 at 11:09:13AM -0700, Greg KH wrote:
> On Tue, May 13, 2003 at 08:01:01AM -0500, Paul Fulghum wrote:
> > On Tue, 2003-05-13 at 12:30, Greg KH wrote:
> > > On Tue, May 13, 2003 at 10:35:07AM -0500, Paul Fulghum wrote:
> > > > On Tue, 2003-05-13 at 10:26, Alan Stern wrote:
> > > > 
> > > > > Putting in a sanity check for the global suspend state will be very easy.  
> > > > > But I would like to point out that this "global suspend" does not refer to
> > > > > the entire system, only the USB bus.
> > > > 
> > > > That is a problem then, because the delay can still
> > > > occur during normal system operation.
> > > 
> > > Ok, can you try the attached patch and see if it causes your latency
> > > problem to go away?
> > 
> > I applied the patch plus a couple of printk statements,
> > and the wakeup_hc() is being continuously called
> > as well as actually executing the delay.
> 
> Is the suspend_hc() function ever getting called by anyone in that
> driver? 

Ok, nevermind, I see where it would be getting called under normal
operation...

Hm, I don't really know.  Johannes, any thoughts?

thanks,

greg k-h