> On Sun, Feb 25, 2007 at 05:21:22PM +0900, YAMAMOTO Takashi wrote:
> 
> > - why doesn't sched_changepri() change l_priority if it was < PUSER? 
> 
> If the LWP has received a priority boost while in the kernel and is waiting
> to run it shouldn't get dropped until it has run.

thanks for explanation.
isn't it better to have a flag to indicate if an lwp is boosted or not,
and kill l_priority?

> Right now the drop in
> priority takes place in userret(). I think that should be moved back into
> remrunqueue() once cpu_switch() is eliminated.

i think userret() is a better place to unboost an lwp than remrunqueue().
if it was in remrunqueue() and we support in-kernel preemption,
an lwp can be preempted immediately after scheduled.

YAMAMOTO Takashi