Yes. The real problem was just the complete explosion of irqs on SGI
machines that have paltry I/O to the outside world compared to their cpu
count. Have 131072 irqs seemed a little much for them.
It is all a game of tuning heuristics right now, and if we can totally
kill NR_IRQS it all goes away. But that is an issue to solve before
the next merge window not to kill the regression.