RE: gradual timeofday overhaul

[Perez-Gonzalez, Inaky]

> From: Richard B. Johnson
>
> You need that hardware interrupt for more than time-keeping.
> Without a hardware-interrupt, to force a new time-slice,
> 
>  	for(;;)
>             ;
> 
> ... would allow a user to grab the CPU forever ...

But you can also schedule, before switching to the new task, 
a local interrupt on the running processor to mark the end 
of the timeslice. When you enter the scheduler, you just need 
to remove that; devil is in the details, but it should be possible
to do in a way that doesn't take too much overhead.

Iñaky Pérez-González -- Not speaking for Intel -- all opinions are my own (and my fault)
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/