Re: [PATCH] x86: Add irq spillover warning

[Thomas Gleixner]

Neil,

On Tue, 16 Jul 2019, Neil Horman wrote:
> On Tue, Jul 16, 2019 at 09:05:30PM +0200, Thomas Gleixner wrote:
> > > Because theres already a check of the same variety in do_IRQ, but if the
> > > information is available outside the hotpath, I was unaware, and am happy to
> > > update this patch to refelct that.
> > 
> > Which check are you referring to?
> > 
> This one:
> if (desc != VECTOR_RETRIGGERED) {
>                         pr_emerg_ratelimited("%s: %d.%d No irq handler for vector\n",
>                                              __func__, smp_processor_id(),
>                                              vector);
> I figured it was already checking one condition, another wouldn't hurt too much,
> but no worries, I'm redoing this in activate_reserved now.

That's in the slow path, when handle_irq() failed which is the unlikely case.

Thanks,

	tglx