Re: [announce] [patch] batch/idle priority scheduling, SCHED_BATCH

[Ingo Molnar]

On Mon, 1 Jul 2002, Andreas Jaeger wrote:

> >> -#define SCHED_OTHER		0
> >> +#define SCHED_NORMAL		0
> >
> >>From IEEE 1003.1-2001 / Open Group Base Spec. Issue 6:
> > "Conforming implementations shall include one scheduling policy
> > identified as SCHED_OTHER (which may execute identically with either the
> > FIFO or round robin scheduling policy)."
> >
> > So, you probably want to add a "#define SCHED_OTHER SCHED_NORMAL" here
> > in order to prevent future confusion, especially because the user-space
> > headers have SCHED_OTHER, but no SCHED_NORMAL.
> 
> This can be done in glibc.  linux/sched.h should not be used by
> userspace applications, glibc has the define in <bits/sched.h> which is
> included from <sched.h> - and <sched.h> is the file defined by Posix.

yes, this was my thinking too.

the reason for the change: with the introduction of SCHED_BATCH the
regular scheduling policy cannot really be called 'other' anymore, from
the point of scheduler internals - it's in the middle of all scheduler
policies, its only speciality is that it's the default one.

(obviously for the user interface it has to be defined.)

	Ingo