Re: 2.4.x VM problems thread

[Luigi Genoni]

On Wed, 8 Aug 2001, Luigi Genoni wrote:

>
>
> On Tue, 7 Aug 2001, Mike Fedyk wrote:
>
> > On Wed, Aug 08, 2001 at 02:24:37AM +0200, Luigi Genoni wrote:
> > > This kind of code would kill any Unix system, i think, not just linux 2.4
> > > boxes.
> > >
> >
> > I tried it on 2.2.19-ppc and could kill it with ^C at the prompt, or from
> > root if I was already logged in.  Trying to iniate connections to ssh didn't
> > produce any results after about 30 seconds.
> with linux 2.2 if you run this program and then try to run another process
> you will get a "cannot fork" message.
> no cresh if you can make a ^C or a killall, (you should not be able to run
> a ps). This is the same behaviour of Solaris. With Linux 2.4 you will
> start to fill your swap. kswapd will really stress your system. then you
> should not be able to run any process. If X11 is running, it will be
> freezed.
excuse me, i was starting to write something about X11, then i changed my
mind.
Just read "It will be freezed"
> Same thing if you run AIX and Irix. Note that AIX and Irix are
> quite different on any point of view if you go to process management :).
>
> mmm, HP-UX 10.20 should get frozen too, while HP-UX 11 should act like
> Linux 2.2 (not sure about this, I should check). I do not know about
> FreeBSD.
>
> What changes is the way the system acts when it has to execute a code like
> for (;;)
> 	fork();
>
> That is not related to vm. It is just how fork() is managed.
>
> Note also that libc matters.
>
> >
> > Once it was killed the system was fine.
> >
> > Haven't tried 2.4 yet...
> >
>
> you will see a different behaviour.
>
> bests
> Luigi
>
>
Luigi