Re: [uPATCH] sched.c change; snappy_response++

Wolfram Gloger (wmglo@dent.med.uni-muenchen.de)
10 Mar 1998 15:13:28 -0000

> - --- linux/kernel/sched.c.orig Mon Mar 9 20:58:54 1998
> +++ linux/kernel/sched.c Mon Mar 9 20:59:22 1998
> @@ -231,6 +231,7 @@
> /* .. and a slight advantage to the current process */
> if (p == prev)
> weight += 1;
> + weight += p->priority;
> }
>
> return weight;

When considering such a change, please also consider this one (for
exploiting the fast thread context switch somewhat better):

@@ -277,8 +277,8 @@
weight += PROC_CHANGE_PENALTY;
#endif

- /* .. and a slight advantage to the current process */
- if (p == prev)
+ /* .. and a slight advantage to the current thread */
+ if (p->mm == prev->mm)
weight += 1;
}

It was originally proposed by Linus and Stephen Tweedie almost two
years (!) ago. (I can dig out the reference if wanted.)

Regards,
Wolfram.

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