[pve-devel] [PATCH qemu-server] fix Bug #615 Windows guests suddenly hangs after couple times of migration

[Wolfgang Link]

No this is the real solution.
The first patch was only the workaround and will not come in the code.

On 09/20/2016 07:37 AM, Alexandre DERUMIER wrote:
> Do we need this patch, with the new qemu-kvm patch ?
> 
> 
> ----- Mail original -----
> De: "Wolfgang Link" <w.link at proxmox.com>
> À: "pve-devel" <pve-devel at pve.proxmox.com>
> Envoyé: Vendredi 16 Septembre 2016 13:14:51
> Objet: [pve-devel] [PATCH qemu-server] fix Bug #615 Windows guests	suddenly hangs after couple times of migration
> 
> Windows has a clock/tick problem when it is live-migrated. 
> This problem ends in a pseudo freeze status. 
> The solution is to stop the clock, when we suspend the VM for live-migration. 
> 
> see man kvm -rtc clock=vm 
> 
> The drawback is the VM will lose a little time on every live migration. 
> So with this setting it is recommended to have a time-sync client in the VM to keep the time. 
> --- 
> PVE/QemuServer.pm | 1 + 
> 1 file changed, 1 insertion(+) 
> 
> diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm 
> index dbd85a0..d3eeac5 100644 
> --- a/PVE/QemuServer.pm 
> +++ b/PVE/QemuServer.pm 
> @@ -3002,6 +3002,7 @@ sub config_to_command { 
> $ostype eq 'wvista') { 
> push @$globalFlags, 'kvm-pit.lost_tick_policy=discard'; 
> push @$cmd, '-no-hpet'; 
> + push @$rtcFlags, 'clock=vm'; 
> if (qemu_machine_feature_enabled ($machine_type, $kvmver, 2, 3)) { 
> push @$cpuFlags , 'hv_spinlocks=0x1fff' if !$nokvm; 
> push @$cpuFlags , 'hv_vapic' if !$nokvm; 
>