Re: What I suspect
Rogier Wolff (R.E.Wolff@BitWizard.nl)
Wed, 8 Dec 1999 19:53:31 +0100 (MET)
Linus Torvalds wrote:
> So I think it's a great notion, but it just sucks in real life. And it
> wouldn't allow the interesting things like gettimeofday() that really only
> the kernel can do: you can calibrate the clock in user space, but you
> cannot do things like automatically re-calibrate after a suspend event
> etc, which is critical on laptops and will be even more so with the new
> dual-frequency coppermine CPU's from Intel... (were not only the base time
> changes, but the frequency of the clock changes too).
>
> There _are_ a lot of issues like this where the kernel really knows things
> that user space can not easily know.
Wouldn't you specify
struct fast_time {
volatile int jiffies;
volatile int CPUspeed;
volatile int time_base;
};
such that the kernel can adjust these values whenever the "resume"
event comes in?
Roger.
--
** R.E.Wolff@BitWizard.nl ** http://www.BitWizard.nl/ ** +31-15-2137555 **
*-- BitWizard writes Linux device drivers for any device you may have! --*
"I didn't say it was your fault. I said I was going to blame it on you."
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