linux-kernel - Re: [RFC PATCH] kvm: Use huge pages for DAX-backed files

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Message-ID: <20181106161720.4a0ecc11@gnomeregan.cam.corp.google.com>
Date:   Tue, 6 Nov 2018 16:17:20 -0500
From:   Barret Rhoden <brho@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Dan Williams <dan.j.williams@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Ross Zwisler <zwisler@...nel.org>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        linux-nvdimm@...ts.01.org, linux-kernel@...r.kernel.org,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        kvm@...r.kernel.org, yu.c.zhang@...el.com, yi.z.zhang@...el.com
Subject: Re: [RFC PATCH] kvm: Use huge pages for DAX-backed files

On 2018-11-06 at 22:16 Paolo Bonzini <pbonzini@...hat.com> wrote:
> Yes, iter.gfn is the gfn inside the loop and iter.level is the level
> (1=PTE, 2=PDE, ...).  iter.level of course is unusable here, similar to
> *levelp in transparent_hugepage_adjust, but you can use iter.gfn and
> gfn_to_hva.

Great, thanks!