Re: [PATCH v5 2/2] kvm: Use huge pages for DAX-backed files

[Sean Christopherson]

On Mon, Dec 16, 2019 at 11:05:26AM -0500, Barret Rhoden wrote:
> On 12/13/19 12:19 PM, Sean Christopherson wrote:
> >Teaching thp_adjust() how to handle 1GB wouldn't be a bad thing.  It's
> >unlikely THP itself will support 1GB pages any time soon, but having the
> >logic there wouldn't hurt anything.
> >
> 
> Cool.  This was my main concern - I didn't want to break THP.
> 
> I'll rework the series based on all of your comments.

Hopefully you haven't put too much effort into the rework, because I want
to commandeer the proposed changes and use them as the basis for a more
aggressive overhaul of KVM's hugepage handling.  Ironically, there's a bug
in KVM's THP handling that I _think_ can be avoided by using the DAX
approach of walking the host PTEs.

I'm in the process of testing, hopefully I'll get a series sent out later
today.  If not, I should at least be able to provide an update.