andrijapanic commented on issue #2870: KVM HyperV Enlightment for Improved Windows Server 2008+ Performance URL: https://github.com/apache/cloudstack/pull/2870#issuecomment-431709605 Simon, a question here (since we have been using this internally in production for 1.5+years, but never pushed upstream...) Why don't implement this on all Windows* OS types, not just Windows PV - reason being, that, afaik, this is not related only to paravirtualization (Windows PV vs "regular" WIndows OS type in CloudStack), and the main reason for us was NOT the performance (which is there, as you described) - but mainly to avoid the very frequent BSOD with Windows 2008 with heavily loaded MSSQL servers and such. I believe it makes sense to implement for all OS types matching "Windows*" And we have been using this on Ubuntu 14.04 hosts all the time (means tested on Ubuntu, as you asked) hv_relaxed vs. BSOD - slide 15: https://www.linux-kvm.org/images/0/0a/2012-forum-kvm_hyperv.pdf
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