Hi, another small patch I would like to share.
Newer versions of libvirt and kvm support the cpu feature hv_spinlocks, hv_relaxe (e.g. see here http://wiki.qemu.org/ChangeLog/1.1) To make that work in ON4.4 I attached a small patch, so you can configure that in sunstone (Templates -> OS-Booting -> Features) and the XML is added to the features section of deployment.xml It adds: <features> … <hyperv> <relaxed state='on'/> <vapic state='on'/> <spinlocks state='on' retries='4096'/> </hyperv> </features> Beware that you need a current libvirt and qemu before activating that feature. (Dont know, if that is already supported in e.g. RH6.x but I suppose so). See also here: http://www.linux-kvm.org/wiki/images/0/0a/2012-forum-kvm_hyperv.pdf Best, Michael
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