Re: [PATCH] Prevent nested interrupts when the IRQ stack is near overflowing v2

Andi Kleen
2010-03-25T15:38:10Z

> > Well it's simply the current state of affairs today. I'm merely
> > attempting to make the current state slightly safer without breaking
> > anything in the process.
>
> Well, I'd agree if those stack overflows would be a massive reported
> problem.

At least the people who reported it to me thought it was a massive
problem @)

> Right now they happen with a weird test case which points out a
> trouble spot. Multi vector NICs under heavy load. So why not go there
> and change the handful of drivers to run their handlers with irqs
> disabled?

Ok, but afaik it's not that small a number: MSI-X support is getting
more and more wide spread. It's pretty universal in the 10+GbitE space
for space and starts getting deployed for block too.

-Andi
--
ak@linux.intel.com -- Speaking for myself only.