Re: CVS commit: src/sys/netinet

[David Holland <dholland-sourcechanges%netbsd.org@localhost>]

On Wed, Aug 11, 2010 at 02:35:49PM +0300, Antti Kantee wrote:
 > delay is a busyloop while kpause yields.  You cannot use the latter
 > without thread context (i.e. in a hard interrupt).  delay is not really
 > preferrable, but if *must* use it: a) when you don't have thread context
 > b) if you're doing something performance/timing critical and can't afford
 > the jitter and inaccuracy from a sleep.
 > 
 > [...]
 >
 > (although I guess the point about nothing being able to run is not true
 > anymore with kernel preemption)

If (b) is going to remain workable it had better disable preemption...

-- 
David A. Holland
dholland%netbsd.org@localhost