Re: I/O problems in 2.4.19/2.4.20/2.4.21-rc3

[Christian Klose (christian.klose@freenet.de)]

On Saturday 24 May 2003 16:28, William Lee Irwin III wrote:

Hi wli,

> > --- old/kernel/sched.c	2003-05-24 14:45:57.000000000 +0200
> > +++ 2.5-mcp/kernel/sched.c	2003-05-24 16:18:42.000000000 +0200
> > @@ -65,7 +65,7 @@
> >   * they expire.
> >   */
> >  #define MIN_TIMESLICE		( 10 * HZ / 1000)
> > -#define MAX_TIMESLICE		(200 * HZ / 1000)
> > +#define MAX_TIMESLICE		( 10 * HZ / 1000)
> >  #define CHILD_PENALTY		50
> >  #define PARENT_PENALTY		100
> >  #define EXIT_WEIGHT		3

> This looks highly suspicious as it essentially removes dynamic timeslice
> sizing. If this fixes something, then dynamic timeslice heuristics are
> going wrong somewhere that should be properly described and handled, not
> this kind of shenanigan.
I somewhat agree with you but this "properly described" are all the bug 
reports on lkml containing "bad interactivity in 2.5, cpu starving in 2.5" 
and such...

This isn't a shenanigan, at least not for the interactivity for a desktop. 
This is a workaround for users who are complaining about bad interactivity in 
2.5!

ciao, Marc


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