Re: [tip:sched/core] sched: Keep kthreads at default priority

[Peter Zijlstra]

On Wed, 2009-09-09 at 09:55 -0700, Dmitry Torokhov wrote:
> On Wed, Sep 09, 2009 at 03:37:34PM +0000, tip-bot for Mike Galbraith wrote:
> > 
> > diff --git a/kernel/kthread.c b/kernel/kthread.c
> > index eb8751a..5fe7099 100644
> > --- a/kernel/kthread.c
> > +++ b/kernel/kthread.c
> > @@ -16,8 +16,6 @@
> >  #include <linux/mutex.h>
> >  #include <trace/events/sched.h>
> >  
> > -#define KTHREAD_NICE_LEVEL (-5)
> > -
> 
> Why don't we just redefine it to 0? We may find out later that we'd
> still prefer to have kernel threads have boost.

Seems sensible, also the traditional reasoning behind this nice level is
that kernel threads do work on behalf of multiple tasks. Its a kind of
prio ceiling thing.

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