On Thu, Jul 11, 2002 at 11:41:04PM -0700, Alfred Perlstein wrote: > > That's a cool idea.. haven't looked at NetBSD but am imagining the > > mbufs would be linked in a 'ring'. This works because you never > > care how many references are, just whether there's one or more than > > one, and this is easy to tell by examining the ring pointer. > > I.e., you never have to iterate through the entire ring. > > That's true, but could someone explain how one can safely and > effeciently manipulate such a structure in an SMP environment? > > I'm not saying it's impossible, I'm just saying it didn't seem > intuative to me back then, as well as now.
I'm probably speaking out of turn here (I have no idea what structure you all are talking about), but a monodirectional ring can be safely modified with a compare-and-exchange atomic operation. -- Jonathan Mini <[EMAIL PROTECTED]> http://www.freebsd.org/ To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-net" in the body of the message
