Re: [PATCH] [6/12] x86_64: Early segment setup for VT

[H. Peter Anvin]

Andi Kleen wrote:
> From: Zachary Amsden <zach@xxxxxxxxxx>
>
> VT is very picky about when it can enter execution.
> Get all segments setup and get LDT and TR into valid state to allow
> VT execution under VMware and KVM (untested).
>
> This makes the boot decompression run under VT, which makes it several
> orders of magnitude faster on 64-bit Intel hardware.
>
> Before, I was seeing times up to a minute or more to decompress a 1.3MB kernel
> on a very fast box.
>
> Signed-off-by: Zachary Amsden <zach@xxxxxxxxxx>
> Signed-off-by: Andi Kleen <ak@xxxxxxx>

Makes a lot of sense to me.

	-hpa
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