[pve-devel] [PATCH qemu-server 0/2] hv_stimer && hv_synic support

Dominik Csapak d.csapak at proxmox.com
Tue Jun 26 10:28:55 CEST 2018


On 06/24/2018 08:47 PM, Alexandre Derumier wrote:
> Users have reported cpu problem with last windows 10 update (1803)
> https://forum.proxmox.com/threads/high-cpu-load-for-windows-10-guests-when-idle.44531/
> 
> adding hyperv hv_stimer && hv_synic fix the problem.
> 
> This patch series add support to defines them as cpu options,
> 
> and enable them by default for next qemu 2.12 && win >= 8. (don't have tested win7)
> 
> Alexandre Derumier (2):
>    add hv_stimer, hv_synic cpu flags option
>    enable hv_synic && hv_stimer by default for qemu 2.12 && windows >= 8
> 
>   PVE/QemuServer.pm | 9 +++++++--
>   1 file changed, 7 insertions(+), 2 deletions(-)
> 

hi,

great to see that there is a nice fix for that.

is there any more documentation for those flags and why exactly they are 
needed (the redhat bugzilla entry is rather sparse with information)

also why only with qemu 2.12 ? does it not work for the current 2.11?
(or did you do this so that the live migration works?)

does this also work with older win10/2016?



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