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RE: [PATCH] calibrate_tsc(): use the Stall() EFI boot service on GRUB_MA
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From: |
Elliott, Robert (Persistent Memory) |
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Subject: |
RE: [PATCH] calibrate_tsc(): use the Stall() EFI boot service on GRUB_MACHINE_EFI |
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Date: |
Sat, 28 Nov 2015 05:25:55 +0000 |
> -----Original Message-----
> From: address@hidden [mailto:grub-devel-
> address@hidden On Behalf Of Andrei Borzenkov
> Sent: Friday, November 27, 2015 11:56 AM
> To: The development of GNU GRUB <address@hidden>;
> address@hidden; address@hidden; address@hidden;
> address@hidden
> Subject: Re: [PATCH] calibrate_tsc(): use the Stall() EFI boot
> service on GRUB_MACHINE_EFI
>
> 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.
>
Patch d43a5ee results in make failing:
make[3]: *** No rule to make target 'commands/efi/acpi.c', needed by
'commands/efi/acpi_module-acpi.o'. Stop.
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Robert Elliott, HPE Persistent Memory