Re: [PATCH Part2 RFC v2 08/37] x86/sev: Split the physmap when adding the page in RMP table

From: Dave Hansen
Date: Mon May 03 2021 - 11:41:56 EST

On 5/3/21 8:15 AM, Andy Lutomirski wrote:
> How much performance do we get back if we add a requirement that only
> 2M pages (hugetlbfs, etc) may be used for private guest memory?

Are you generally asking about the performance overhead of using 4k
pages instead of 2M for the direct map? We looked at that recently and
pulled together some data: