linux-kernel - Re: Thoughts on simple scanner approach for free page hinting

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Message-ID: <20190409092625-mutt-send-email-mst@kernel.org>
Date:   Tue, 9 Apr 2019 09:31:18 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     David Hildenbrand <david@...hat.com>
Cc:     Alexander Duyck <alexander.duyck@...il.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: Thoughts on simple scanner approach for free page hinting

On Tue, Apr 09, 2019 at 11:20:36AM +0200, David Hildenbrand wrote:
> BTW I like the idea of allocating pages that have already been hinted as
> last "choice", allocating pages that have not been hinted yet first.

OK I guess but note this is just a small window during which
not all pages have been hinted.

So if we actually think this has value then we need
to design something that will desist and not drop pages
in steady state too.

-- 
MST