Answers to the questions about r39721 and r39723

[Dmitry Gorbachev]

Hi,

Alex Ionescu wrote:
> This new hack directly slows down every context switch instead of every
> page fault -- the latter is a less important perf hit.

This slowdown is very small, especially when comparing with other
"Hack of Doom".
I just want to see, is it the only raison d'être of that old hack or not.

Aleksey Bragin wrote:
> Why so, Dmitry? Looks like a hack?

IopEnumerateDevice() loads drivers, but link in ArcName directory for
a boot device
should exist for it.