Re: [2.4.17/18pre] VM and swap - it's really unusable
yodaiken@fsmlabs.com
Mon, 14 Jan 2002 11:39:10 -0700
On Mon, Jan 14, 2002 at 07:43:59PM +0100, Daniel Phillips wrote:
> On January 14, 2002 10:09 am, yodaiken@fsmlabs.com wrote:
> > UNIX generally tries to ensure liveness. So you know that
> > cat lkarchive | grep feel | wc
> > will complete and not just that, it will run pretty reasonably because
> > for UNIX _every_ process is important and gets cpu and IO time.
> > When you start trying to add special low latency tasks, you endanger
> > liveness. And preempt is especially corrosive because one of the
> > mechanisms UNIX uses to assure liveness is to make sure that once a
> > process starts it can do a significant chunk of work.
>
> You're claiming that preemption by nature is not Unix-like?
Kernel preemption is not traditionally part of UNIX.
>
> --
> Daniel
--
---------------------------------------------------------
Victor Yodaiken
Finite State Machine Labs: The RTLinux Company.
www.fsmlabs.com www.rtlinux.com
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