linux-kernel - Re: [PATCH v33 0/4] Virtio-balloon: support free page reporting

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Date:   Fri, 15 Jun 2018 14:29:43 +0300
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Wei Wang <wei.w.wang@...el.com>
Cc:     virtio-dev@...ts.oasis-open.org, linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
        linux-mm@...ck.org, mhocko@...nel.org, akpm@...ux-foundation.org,
        torvalds@...ux-foundation.org, pbonzini@...hat.com,
        liliang.opensource@...il.com, yang.zhang.wz@...il.com,
        quan.xu0@...il.com, nilal@...hat.com, riel@...hat.com,
        peterx@...hat.com
Subject: Re: [PATCH v33 0/4] Virtio-balloon: support free page reporting

On Fri, Jun 15, 2018 at 12:43:09PM +0800, Wei Wang wrote:
>       - remove the cmd id related interface. Now host can just send a free
>         page hint command to the guest (via the host_cmd config register)
>         to start the reporting.

Here we go again. And what if reporting was already started previously?
I don't think it's a good idea to tweak the host/guest interface yet
again.

-- 
MST