linux-kernel - Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration

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Date:   Wed, 7 Dec 2016 10:44:31 -0800
From:   Dave Hansen <dave.hansen@...el.com>
To:     Andrea Arcangeli <aarcange@...hat.com>
Cc:     David Hildenbrand <david@...hat.com>,
        "Li, Liang Z" <liang.z.li@...el.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "mhocko@...e.com" <mhocko@...e.com>,
        "mst@...hat.com" <mst@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "qemu-devel@...gnu.org" <qemu-devel@...gnu.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "dgilbert@...hat.com" <dgilbert@...hat.com>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "virtualization@...ts.linux-foundation.org" 
        <virtualization@...ts.linux-foundation.org>,
        "kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>
Subject: Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast
 (de)inflating & fast live migration

On 12/07/2016 10:38 AM, Andrea Arcangeli wrote:
>> > and leaves room for the bitmap size to be encoded as well, if we decide
>> > we need a bitmap in the future.
> How would a bitmap ever be useful with very large page-order?

Please, guys.  Read the patches.  *Please*.

The current code doesn't even _use_ a bitmap.