linux-kernel - Re: [PATCH v1 6/6] virtio-balloon: Add support for aerating memory via hinting

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Message-ID: <20190716110357-mutt-send-email-mst@kernel.org>
Date:   Tue, 16 Jul 2019 11:04:27 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     David Hildenbrand <david@...hat.com>
Cc:     Dave Hansen <dave.hansen@...el.com>,
        Alexander Duyck <alexander.duyck@...il.com>, nitesh@...hat.com,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, akpm@...ux-foundation.org,
        yang.zhang.wz@...il.com, pagupta@...hat.com, riel@...riel.com,
        konrad.wilk@...cle.com, lcapitulino@...hat.com,
        wei.w.wang@...el.com, aarcange@...hat.com, pbonzini@...hat.com,
        dan.j.williams@...el.com, alexander.h.duyck@...ux.intel.com
Subject: Re: [PATCH v1 6/6] virtio-balloon: Add support for aerating memory
 via hinting

On Tue, Jul 16, 2019 at 04:17:13PM +0200, David Hildenbrand wrote:
> On 16.07.19 16:12, David Hildenbrand wrote:
> > On 16.07.19 16:00, Dave Hansen wrote:
> >> On 7/16/19 2:55 AM, Michael S. Tsirkin wrote:
> >>> The approach here is very close to what on-demand hinting that is
> >>> already upstream does.
> >>
> >> Are you referring to the s390 (and powerpc) stuff that is hidden behind
> >> arch_free_page()?
> >>
> > 
> > I assume Michael meant "free page reporting".
> > 
> 
> (https://lwn.net/Articles/759413/)


Yes - VIRTIO_BALLOON_F_FREE_PAGE_HINT.

> -- 
> 
> Thanks,
> 
> David / dhildenb