Re: how to echo to stay in openmosix 2.6.17?

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Hi Apollo,

On Wed, 2007-03-28 at 09:02 -0400, Apollo Wong wrote:
> I need to protect the Xvnc process on each node not to be migrated. I
> was trying to manually echo some stay reason into /proc/$PID/om/stay,
> but all I got is invalid arguments from bash. So my question is how
> can I protect a process manually from migrating in om2.6? Am I on the
> right track to try using om/stay? Or there are something else. Thanks.

os/stay is created by the om-kernel. If the kernel says it's possible to
migrate the process, omd will migrate it. To prevent something like
this, omd needs to be extended.

Processes are normally 'blacklisted' if om/stay is not empty. The check
to see if a process is blacklisted can be extended to check processnames
against a list which contains "don't migrate these processes".

This requires reading some config-file and creating such a list with
processnames. I think the check against the list should be done in
libom.py ProcessList.getProcessInfo(pid).

If you're able to create a patch, I'll happily integrate it into SVN. At
the moment I do not have much time for stuff like this, unfortunately.
For now I've noted it on the TODO-list in the README.

Cheers,
Niels

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