Re: Break 2.4 VM in five easy steps

Russell Leighton (russell.leighton@247media.com)
Tue, 05 Jun 2001 21:42:26 -0400

I also need some 2.4 features and can't really goto 2.2.
I would have to agree that the VM is too broken for production...looking
forward to the work that (hopefully) will be in 2.4.6 to resolve these issues.

"Jeffrey W. Baker" wrote:

> On Tue, 5 Jun 2001, Derek Glidden wrote:
>
> >
> > After reading the messages to this list for the last couple of weeks and
> > playing around on my machine, I'm convinced that the VM system in 2.4 is
> > still severely broken.
> >
> > This isn't trying to test extreme low-memory pressure, just how the
> > system handles recovering from going somewhat into swap, which is a real
> > day-to-day problem for me, because I often run a couple of apps that
> > most of the time live in RAM, but during heavy computation runs, can go
> > a couple hundred megs into swap for a few minutes at a time. Whenever
> > that happens, my machine always starts acting up afterwards, so I
> > started investigating and found some really strange stuff going on.
>
> I reboot each of my machines every week, to take them offline for
> intrusion detection. I use 2.4 because I need advanced features of
> iptables that ipchains lacks. Because the 2.4 VM is so broken, and
> because my machines are frequently deeply swapped, they can sometimes take
> over 30 minutes to shutdown. They hang of course when the shutdown rc
> script turns off the swap. The first few times this happened I assumed
> they were dead.
>
> So, unlike what certain people like to repeatedly claim, the 2.4 VM
> problems are causing havoc in the real world.
>
> -jwb
>
> -
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--
---------------------------------------------------
Russell Leighton    russell.leighton@247media.com


Programming today is a race between software
engineers striving to build bigger and better
idiot-proof programs, and the Universe trying to
produce bigger and better idiots. So far, the
Universe is winning. - Rich Cook
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