linux-kernel - Re: [PATCH v7 kernel 5/5] This patch contains two parts:

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Message-ID: <d66a8e86-0ead-90fd-b943-f69449e78349@redhat.com>
Date:   Mon, 6 Mar 2017 14:23:02 +0100
From:   David Hildenbrand <david@...hat.com>
To:     Wei Wang <wei.w.wang@...el.com>, virtio-dev@...ts.oasis-open.org,
        kvm@...r.kernel.org, qemu-devel@...gnu.org,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, linux-mm@...ck.org
Cc:     Liang Li <liang.z.li@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mel Gorman <mgorman@...hsingularity.net>,
        "Michael S . Tsirkin" <mst@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Cornelia Huck <cornelia.huck@...ibm.com>,
        Amit Shah <amit.shah@...hat.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Liang Li <liliang324@...il.com>
Subject: Re: [PATCH v7 kernel 5/5] This patch contains two parts:

Am 03.03.2017 um 06:40 schrieb Wei Wang:
> From: Liang Li <liang.z.li@...el.com>

I'd prefer to split this into two parts then and to create proper subjects.

If I remember correctly, the general concept was accepted by most reviewers.

> 
> One is to add a new API to mm go get the unused page information.
> The virtio balloon driver will use this new API added to get the
> unused page info and send it to hypervisor(QEMU) to speed up live
> migration. During sending the bitmap, some the pages may be modified
> and are used by the guest, this inaccuracy can be corrected by the
> dirty page logging mechanism.
> 
> One is to add support the request for vm's unused page information,
> QEMU can make use of unused page information and the dirty page
> logging mechanism to skip the transportation of some of these unused
> pages, this is very helpful to reduce the network traffic and speed
> up the live migration process.

-- 
Thanks,

David