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Re: [Qemu-devel] [PATCH v3 kernel 0/7] Extend virtio-balloon for fast (d
From: |
Li, Liang Z |
Subject: |
Re: [Qemu-devel] [PATCH v3 kernel 0/7] Extend virtio-balloon for fast (de)inflating & fast live migration |
Date: |
Thu, 18 Aug 2016 01:05:53 +0000 |
Hi Michael,
Could you help to review this version when you have time?
Thanks!
Liang
> -----Original Message-----
> From: Li, Liang Z
> Sent: Monday, August 08, 2016 2:35 PM
> To: address@hidden
> Cc: address@hidden; address@hidden; virtio-
> address@hidden; address@hidden; address@hidden;
> address@hidden; address@hidden; Hansen, Dave; Li, Liang Z
> Subject: [PATCH v3 kernel 0/7] Extend virtio-balloon for fast (de)inflating &
> fast live migration
>
> This patch set contains two parts of changes to the virtio-balloon.
>
> One is the change for speeding up the inflating & deflating process, the main
> idea of this optimization is to use bitmap to send the page information to
> host instead of the PFNs, to reduce the overhead of virtio data transmission,
> address translation and madvise(). This can help to improve the performance
> by about 85%.
>
> Another change is for speeding up live migration. By skipping process guest's
> free pages in the first round of data copy, to reduce needless data
> processing,
> this can help to save quite a lot of CPU cycles and network bandwidth. We
> put guest's free page information in bitmap and send it to host with the virt
> queue of virtio-balloon. For an idle 8GB guest, this can help to shorten the
> total live migration time from 2Sec to about 500ms in the 10Gbps network
> environment.
>
> Dave Hansen suggested a new scheme to encode the data structure,
> because of additional complexity, it's not implemented in v3.
>
> Changes from v2 to v3:
> * Change the name of 'free page' to 'unused page'.
> * Use the scatter & gather bitmap instead of a 1MB page bitmap.
> * Fix overwriting the page bitmap after kicking.
> * Some of MST's comments for v2.
>
> Changes from v1 to v2:
> * Abandon the patch for dropping page cache.
> * Put some structures to uapi head file.
> * Use a new way to determine the page bitmap size.
> * Use a unified way to send the free page information with the bitmap
> * Address the issues referred in MST's comments
>
>
> Liang Li (7):
> virtio-balloon: rework deflate to add page to a list
> virtio-balloon: define new feature bit and page bitmap head
> mm: add a function to get the max pfn
> virtio-balloon: speed up inflate/deflate process
> mm: add the related functions to get unused page
> virtio-balloon: define feature bit and head for misc virt queue
> virtio-balloon: tell host vm's unused page info
>
> drivers/virtio/virtio_balloon.c | 390
> ++++++++++++++++++++++++++++++++----
> include/linux/mm.h | 3 +
> include/uapi/linux/virtio_balloon.h | 41 ++++
> mm/page_alloc.c | 94 +++++++++
> 4 files changed, 485 insertions(+), 43 deletions(-)
>
> --
> 1.8.3.1
- [Qemu-devel] [PATCH v3 kernel 2/7] virtio-balloon: define new feature bit and page bitmap head, (continued)
- [Qemu-devel] [PATCH v3 kernel 2/7] virtio-balloon: define new feature bit and page bitmap head, Liang Li, 2016/08/08
- [Qemu-devel] [PATCH v3 kernel 1/7] virtio-balloon: rework deflate to add page to a list, Liang Li, 2016/08/08
- [Qemu-devel] [PATCH v3 kernel 3/7] mm: add a function to get the max pfn, Liang Li, 2016/08/08
- [Qemu-devel] [PATCH v3 kernel 4/7] virtio-balloon: speed up inflate/deflate process, Liang Li, 2016/08/08
- [Qemu-devel] [PATCH v3 kernel 5/7] mm: add the related functions to get unused page, Liang Li, 2016/08/08
- [Qemu-devel] [PATCH v3 kernel 6/7] virtio-balloon: define feature bit and head for misc virt queue, Liang Li, 2016/08/08
- [Qemu-devel] [PATCH v3 kernel 7/7] virtio-balloon: tell host vm's unused page info, Liang Li, 2016/08/08
- Re: [Qemu-devel] [PATCH v3 kernel 0/7] Extend virtio-balloon for fast (de)inflating & fast live migration, Dave Hansen, 2016/08/08
- Re: [Qemu-devel] [PATCH v3 kernel 0/7] Extend virtio-balloon for fast (de)inflating & fast live migration,
Li, Liang Z <=