Re: Interrupt storm mitigation needed

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

On Fri, Feb 13, 2015 at 08:56:12AM -0500, Thor Lancelot Simon wrote:
> But it looks like Tom's still getting the interrupt, which means, at least,
> that he's paying the overhead of a quick "Nope, no handler for this one!"
> return from the interrupt handling code.  How far upstream is it possible
> to disable or mask it, I wonder, without breaking another device you care
> about or having to switch *it* to polled mode?

That's the part that doesn't make sense to me. For a PCI device, the
interrupt is level triggered, so unless the problem is the *querying* in
the interrupt handler, the interrupt itself can't be the problem.

Joerg