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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 8 Dec 2016 20:53:00 -0800
From:   Dave Hansen <dave.hansen@...el.com>
To:     "Li, Liang Z" <liang.z.li@...el.com>,
        Andrea Arcangeli <aarcange@...hat.com>
Cc:     David Hildenbrand <david@...hat.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 12/08/2016 08:45 PM, Li, Liang Z wrote:
> What's the conclusion of your discussion? It seems you want some
> statistic before deciding whether to  ripping the bitmap from the
> ABI, am I right?

I think Andrea and David feel pretty strongly that we should remove the
bitmap, unless we have some data to support keeping it.  I don't feel as
strongly about it, but I think their critique of it is pretty valid.  I
think the consensus is that the bitmap needs to go.

The only real question IMNHO is whether we should do a power-of-2 or a
length.  But, if we have 12 bits, then the argument for doing length is
pretty strong.  We don't need anywhere near 12 bits if doing power-of-2.