Re: Virtual Kernel Update - 14 January

[Bill Huey (hui) <billh@xxxxxxxxxxxxxxxxx>]

On Sun, Jan 14, 2007 at 05:40:38PM -0800, Matthew Dillon wrote:
>     The one remaining issue on the virtual kernel hot list is a high
>     resolution clock interrupt.  I think it is possible to do it using a
>     combination of KQUEUE's timeout feature and SYSTIMERs.  I will spend
>     a little time trying to make this work but no promises.

The Linux -rt folks have made the system timer dynamic and it might be a
good thing to make dfBSD use that mechanism as well for a whole host of
reasons other than real time. It just happens to also be a major problem
with vitualization, paravirtualization, as well. You might want to look
at an implementation of that by Thomas Gleixner. If you want a link,
I'll post one that's a bit technically predigested.

bill