Re: 2.4.23 can run with HZ==0!

[Arjan van de Ven]

On Mon, Dec 29, 2003 at 01:52:40PM +0100, Frank van Maarseveen wrote:
> On Mon, Dec 29, 2003 at 10:45:27AM +0100, Arjan van de Ven wrote:
> > 
> > not all motherboards can deal with HZ=1000.... seems yours is one of
> > thise.
> 
> But it seems to work. I would expect it to fail quite soon right at or after
> boot, not after a day once every few weeks (assuming it was the cause).
> 
> > your patch is *highly* inadequate to get HZ=1000 working well in 2.4....
> > it needs to be about 10x bigger with fixing more userspace api's...
> 
> Can you give me an example?
> 
> HZ for x386 is 100 by definition and there aren't that many system calls
> and /proc files which expose jiffies to userspace.

there are quite a few you missed; scsi ioctls is one, firewall rules are
another.... there's a long list (2.6 has most if not all of them fixed)

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