(In reply to Stefan Priebe from comment #13) > a 2nd note - i'm able to trigger stalls of kvm processes via: How long stalls in that case? > echo 1 >/proc/sys/vm/compact_memory > is this expected? Some disruption would be expected, as manually invoked compaction is much more heavyweight than the usual one. But depends on how long the echo takes to complete, and how long are the associated stalls.