add option to call mlockall in munged

[GoogleCodeExporter]

We've found it useful in our environment to have munged lock its pages upon startup because our compute nodes are often subject to extreme memory and disk pressure. Without locking, munged sometimes gets swapped out and cannot respond to requests quickly enough. This causes the resource manager (slurm in our case) to believe that compute nodes are down when they really aren't.

I've written a patch (attached) that adds an option (-M, --mlockall) to munged so that it will lock pages on startup. It works well in our environment, so I thought it might be useful to others.

0001-Add-mlockall-option-to-munged.patch.gz

Original issue reported on code.google.com by michaelfenn87 on 22 Apr 2013 at 4:26

[GoogleCodeExporter]

Sounds reasonable. Thanks for the patch!

Original comment by chris.m.dunlap on 24 Apr 2013 at 12:12

• Changed state: Accepted
• Added labels: Milestone-0.5.11

[GoogleCodeExporter]

You're welcome, glad to contribute. :)

Michael

Original comment by michaelfenn87 on 24 Apr 2013 at 11:30

[GoogleCodeExporter]

This issue was closed by 0aad599.

Original comment by chris.m.dunlap on 2 May 2013 at 8:25

• Changed state: Fixed