On Wed, 23 Sep 2009, Jan Blunck wrote:

> On Sat, Sep 19, 2009 at 12:39 AM, Thomas Gleixner <tglx@linutronix.de> wrote:
> > We are pleased to announce the next update to our new preempt-rt
> > series.
> >
> >   - disable SPARSE_IRQ, DMAR, IRQ_REMAP for -rt
> >
> 
> Do you have any reports that there is a bug in the SPARSE_IRQ code or
> why did you disable it?

Sparse irq is allocating memory in irq/preempt disabled regions which
makes preempt debug pretty unhappy. It needs some restructuring of
that code. dmar and irqremap have the same problem.

Thanks,

	tglx