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Subject: Re: [PATCH] calibrate_tsc(): use the Stall() EFI boot service on
	GRUB_MACHINE_EFI
To: Vitaly Kuznetsov <vkuznets@redhat.com>
References: <1416992361-4167-1-git-send-email-lersek@redhat.com>
	<56589925.20207@gmail.com> <87h9k3jvp7.fsf@vitty.brq.redhat.com>
From: Andrei Borzenkov <arvidjaar@gmail.com>
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Date: Mon, 30 Nov 2015 19:50:02 +0300
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30.11.2015 19:31, Vitaly Kuznetsov пишет:
> Andrei Borzenkov <arvidjaar@gmail.com> writes:
> 
>> 26.11.2014 11:59, Laszlo Ersek пишет:
>>> HyperV Gen2 virtual machines have no PIT; guest code should rely on UEFI
>>> services instead.
>>>
>>
>> Could you retest with current master? It now supports multiple methods
>> to calibrate TSC and should avoid PIT on UEFI systems.
> 
> Unfortunately, current master (grub-2.02-beta2-561-g346a494) still
> doesn't work for me, timer keeps running like crazy on Gen2 Hyper-V VMs.
> 

@Michael: I remember you tested version of Vladimir patch on Hyper-V?
Could you test current master?