Re: itimer again (Re: [PATCH] RTC: Add mmap method to rtc character driver)

Bill Huey
2006-07-30T01:40:05Z

On Sat, Jul 29, 2006 at 06:22:59PM -0700, Nicholas Miell wrote:
> On Sat, 2006-07-29 at 18:00 -0700, Bill Huey wrote:
> > Think edge triggered verse level triggered. Event interfaces in the Linux
> > kernel are sort of just that, edge triggered events. What RT folks generally
> > want is control over scheduling policies over a particular time period in
> > relation to a scheduling policy. A general kernel event interface isn't
> ^ Did you mean to say timer here?

No, I really ment scheduling.

> > going to cut it for those purpose and wasn't design to deal with those cases
> > in the first place.
>
> So you're asking for an automatic (perhaps temporary) change in
> scheduling policy when a particular timer expires (or perhaps on
> occurrence of other types of events)?

> I think Windows automatically boosts the priority of a thread when it
> delivers an I/O completion notification, and I'm pretty sure that
> Microsoft has a patent related to that.

Na, different problem altogether. It's better that'd shut up.

bill