[Bug 1341195] Re: KVM guests getting slow by time

[Tamas Papp]

On 07/16/2014 09:39 PM, Serge Hallyn wrote
> I've personally not seen it, and noone on my team, who use a lot of
> kvm instances, has seen it.  Our two current theories are that (a) it
> has to do with ksm page migration across numa-nodes, or (b) it has to
> do with a race with transparent hugepages versus ksm.  For (b) there is
> already a commit in Linus' tree (f72e7dcd).  For (a), you can probably

Are you referring to this or a different one?
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1323165

> test by setting /sys/kernel/mm/ksm/merge_across_nodes to 0.  (We are
> trying these as well, but as the testcases are not 100% positive
> it'd be good to have you try as well)

It's 1 now.
Do you you want me to set it now or wait to the result of KSM_ENABLED=0?


I'm not familiar enough with these settings.

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https://bugs.launchpad.net/bugs/1341195

Title:
  KVM guests getting slow by time

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