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Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (d
From: |
Dave Hansen |
Subject: |
Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration |
Date: |
Wed, 7 Dec 2016 08:57:01 -0800 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 |
Removing silly virtio-dev@ list because it's bouncing mail...
On 12/07/2016 08:21 AM, David Hildenbrand wrote:
>> Li's current patches do that. Well, maybe not pfn/length, but they do
>> take a pfn and page-order, which fits perfectly with the kernel's
>> concept of high-order pages.
>
> So we can send length in powers of two. Still, I don't see any benefit
> over a simple pfn/len schema. But I'll have a more detailed look at the
> implementation first, maybe that will enlighten me :)
It is more space-efficient. We're fitting the order into 6 bits, which
would allows the full 2^64 address space to be represented in one entry,
and leaves room for the bitmap size to be encoded as well, if we decide
we need a bitmap in the future.
If that was purely a length, we'd be limited to 64*4k pages per entry,
which isn't even a full large page.
- Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration, David Hildenbrand, 2016/12/06
- Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration, Li, Liang Z, 2016/12/07
- Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration, Dave Hansen, 2016/12/07
- Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration, David Hildenbrand, 2016/12/07
- Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration, Dave Hansen, 2016/12/07
- Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration, David Hildenbrand, 2016/12/07
- Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration,
Dave Hansen <=
- Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration, Andrea Arcangeli, 2016/12/07
- Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration, Dave Hansen, 2016/12/07
- Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration, Andrea Arcangeli, 2016/12/07
- Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration, Dave Hansen, 2016/12/07
- Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration, Andrea Arcangeli, 2016/12/07
- Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration, Li, Liang Z, 2016/12/08
- Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration, Dave Hansen, 2016/12/08
- Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration, Li, Liang Z, 2016/12/09
- Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration, Andrea Arcangeli, 2016/12/09
- Re: [Qemu-devel] [PATCH kernel v5 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration, Li, Liang Z, 2016/12/14