Re: [PATCH RESEND 0/8] hugetlb: add demote/split page functionality

[Andrew Morton]

Also, pushback...

On Mon, 16 Aug 2021 15:49:45 -0700 Mike Kravetz <mike.kravetz@xxxxxxxxxx> wrote:

> 
> Real world use cases
> --------------------
> There are groups today using hugetlb pages to back VMs on x86.  Their
> use case is as described above.  They have experienced the issues with
> performance and not necessarily getting the excepted number smaller huge

("number of")

> pages after free/allocate cycle.
> 

It really is a ton of new code.  I think we're owed much more detail
about the problem than the above.  To be confident that all this
material is truly justified?

Also, some selftests and benchmarking code in tools/testing/selftests
would be helpful?