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Re: [libvirt] [PATCHv2 3/5] qemu: Add support for paravirtual spinlocks in the guest



On 09/26/13 10:59, Peter Krempa wrote:
> The linux kernel recently added support for paravirtual spinlock
> handling to avoid performance regressions on overcomitted hosts. This
> feature needs to be turned in the hypervisor so that the guest OS is
> notified about the possible support.
> 
> This patch adds a new feature "paravirt-spinlock" to the XML and
> supporting code to enable the "kvm_pv_unhalt" pseudoCPU feature in qemu.
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=1008989
> ---

QEMU upstream has now pulled the patches adding this feature:

http://git.qemu.org/?p=qemu.git;a=commit;h=f010bc643a2759e87e989c3e4e85f15ec71ae98f

Peter




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