[ovirt-users] Fwd: Re: Cluster settings: "KSM Control" not working?

Markus Stockhausen stockhausen at collogia.de
Thu Oct 9 19:43:45 UTC 2014


Forgot the CC.

---------- Weitergeleitete Nachricht ----------
Von: Markus Stockhausen <stockhausen at collogia.de>
Datum: 09.10.2014 21:42
Betreff: Re: [ovirt-users] Cluster settings: "KSM Control" not working?
An: Frank Wall <fw at moov.de>
Cc:


Have a look at redhat bugzilla #1114226. It should give an idea what is happening behind the scenes.

Regarding disabling the feature: I would give a reboot of the hypervisor a try.

Markus

Am 09.10.2014 21:31 schrieb Frank Wall <fw at moov.de>:
Hi,

while testing oVirt 3.5 RC I've came across this cluster setting:

Optimization -> KSM control -> [X] Enable KSM

I guess it's related to Kernel Same-page Merging.
Since KSM is a bad idea in my case (really slow CPUs), I've disabled
this Cluster setting, expecting oVirt to disable KSM on each oVirt Node.
But KSM is still running and consuming a lot CPU.

1) What is the expected result for this setting?
2) And how do I completely and permanentely disable KSM on oVirt Nodes?


Regards
- Frank
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