Re: Problems with linux 2.2.10 + beta5 + emc-14-Jun-1999 - anyone ?

> From: Max Heise <mahe@...>
>
> Hi, I'm new to the list. Let me first introduce myself.
> I'm student at the department of mechatronics/automation at the university
> of applied sciences in Esslingen/Germany.
> This is probably kind of offtopic, but is anyone using emc with linux-2.2.x
> and the rtlinux patches for new kernels from ftp.rtlinux.org ?
> The kernel and the rtl examples are running fine, but I get lots of errors
> when building the emc-14-Jun-1999 package - as anyone tried this this yet
> with success?

Actually, no. As several other folks have said, you'll need to use the 2.2.36
kernel with rtlinux-0.9J. Are you using RedHat 6.0 or perhaps S.U.S.E. ? If
Redhat 6.0, I don't know if you will be able to just drop in the 2.0.36
kernel, or whether you need to regress to RedHat 5.2. If S.U.S.E. (or any
other distribution other than RedHat) you are truly an EMC pioneer!

> An other thing for the FAQ:
> A month ago, i've spend two nights to figure out that emc and the shared
> memory is quite sensitive to ipfilters like ipchains and ipfwadm. If you
> get problems with these, flush input/output/firewall rules.

I just got IP Masquerading working on my Linux machine, and this was my first
exposure to ipfwadm (Since I'm running RedHat 5.2 I don't think I have
ipchains). Although I think that most machine tool controllers will be behind
the firewall, rather than being the firewall, it's probably important to
chase down this problem in order to at least understand what's going on. Fred
Proctor reads this list and he is also the rtlinux/shared memory guru. See:

http://www.isd.cme.nist.gov/projects/emc/shmem.html

> If anyone needs the exact error message, send me an email.

Don't go to a lot of trouble, but I'd like to try mixing firewalling and the
EMC on my machine, just to see if I can duplicate your problem under RH5.2.
If possible, let me know what you did and what happened and I'll try it out
here.

Thanks,

Matt Shaver
mshaver@...