Re: 2.4.18 Preempt Freezeups

On Sun, Mar 17, 2002 at 01:33:04AM +0100, Daniel Phillips wrote:
> On March 16, 2002 01:40 am, [e-mail] wrote:
> > 
> > Without preempt:
> > 	x = movefrom processor register;
		// if preemption is on, we can be preempted and restart
		// on another processor so x will be wrong
> >         do_something with x
> > 
> > is safe in SMP
> > With [preempt] it requires a lock.
> 
> It must be a trick question.  Why would it?

See comment.

> 
> -- 
> Daniel

-- 
---------------------------------------------------------
Victor Yodaiken 
Finite State Machine Labs: The RTLinux Company.
 www.fsmlabs.com  www.rtlinux.com