linux-kernel - Re: [RFC][Patch v9 2/6] KVM: Enables the kernel to isolate guest free pages

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Message-ID: <20190307212654-mutt-send-email-mst@kernel.org>
Date:   Thu, 7 Mar 2019 21:28:13 -0500
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Alexander Duyck <alexander.duyck@...il.com>
Cc:     David Hildenbrand <david@...hat.com>,
        Nitesh Narayan Lal <nitesh@...hat.com>,
        kvm list <kvm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-mm <linux-mm@...ck.org>,
        Paolo Bonzini <pbonzini@...hat.com>, lcapitulino@...hat.com,
        pagupta@...hat.com, wei.w.wang@...el.com,
        Yang Zhang <yang.zhang.wz@...il.com>,
        Rik van Riel <riel@...riel.com>, dodgen@...gle.com,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        dhildenb@...hat.com, Andrea Arcangeli <aarcange@...hat.com>
Subject: Re: [RFC][Patch v9 2/6] KVM: Enables the kernel to isolate guest
 free pages

On Thu, Mar 07, 2019 at 02:35:53PM -0800, Alexander Duyck wrote:
> With us hinting currently on MAX_ORDER - 1 pages only that actually
> takes care of the risk of a merge really wiping out any data about
> what has been hinted on and what hasn't.

Oh nice. I had this feeling MAX_ORDER - 1 specifically will
turn out being a better choice than something related to THP.
Now there's an actual reason why this makes things easier!

-- 
MST