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There are a couple potential issues I see:

1) When disabling KSM, (⁠7.3.4. Deactivating KSM), After KSM is disabled, any memory pages that were shared -before- the deactivation are still shared.  I don't know if these's a good way to "un-share" current pages other than shutting down the VMs, or rebooting the host.  Not sure if this worth mentioning...

2) It is possible that KSM can reduce the occurrence of transparent huge pages, a feature which provides sometimes significant performance benefits (7.2.3. Huge Pages and Transparent Huge Pages).  This is probably worth mentioning, perhaps in the THP section (and refer to 7.3.4 for disabling KSM).

Thank you Andrea!
Laura

Published on December 17 version 2-24

Published on December 17 version 2-24