[dpdk-dev] [PATCH 0/4 for 2.3] vhost-user live migration support
Victor Kaplansky
victork at redhat.com
Wed Dec 2 15:10:56 CET 2015
On Wed, Dec 02, 2015 at 11:43:09AM +0800, Yuanhan Liu wrote:
> This patch set adds the initial vhost-user live migration support.
>
> The major task behind that is to log pages we touched during
> live migration. So, this patch is basically about adding vhost
> log support, and using it.
>
> Patchset
> ========
> - Patch 1 handles VHOST_USER_SET_LOG_BASE, which tells us where
> the dirty memory bitmap is.
>
> - Patch 2 introduces a vhost_log_write() helper function to log
> pages we are gonna change.
>
> - Patch 3 logs changes we made to used vring.
>
> - Patch 4 sets log_fhmfd protocol feature bit, which actually
> enables the vhost-user live migration support.
>
> A simple test guide (on same host)
> ==================================
>
> The following test is based on OVS + DPDK. And here is guide
> to setup OVS + DPDK:
>
> http://wiki.qemu.org/Features/vhost-user-ovs-dpdk
>
> 1. start ovs-vswitchd
>
> 2. Add two ovs vhost-user port, say vhost0 and vhost1
>
> 3. Start a VM1 to connect to vhost0. Here is my example:
>
> $QEMU -enable-kvm -m 1024 -smp 4 \
> -chardev socket,id=char0,path=/var/run/openvswitch/vhost0 \
> -netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce \
> -device virtio-net-pci,netdev=mynet1,mac=52:54:00:12:34:58 \
> -object memory-backend-file,id=mem,size=1024M,mem-path=$HOME/hugetlbfs,share=on \
> -numa node,memdev=mem -mem-prealloc \
> -kernel $HOME/iso/vmlinuz -append "root=/dev/sda1" \
> -hda fc-19-i386.img \
> -monitor telnet::3333,server,nowait -curses
>
> 4. run "ping $host" inside VM1
>
> 5. Start VM2 to connect to vhost0, and marking it as the target
> of live migration (by adding -incoming tcp:0:4444 option)
>
> $QEMU -enable-kvm -m 1024 -smp 4 \
> -chardev socket,id=char0,path=/var/run/openvswitch/vhost1 \
> -netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce \
> -device virtio-net-pci,netdev=mynet1,mac=52:54:00:12:34:58 \
> -object memory-backend-file,id=mem,size=1024M,mem-path=$HOME/hugetlbfs,share=on \
> -numa node,memdev=mem -mem-prealloc \
> -kernel $HOME/iso/vmlinuz -append "root=/dev/sda1" \
> -hda fc-19-i386.img \
> -monitor telnet::3334,server,nowait -curses \
> -incoming tcp:0:4444
>
> 6. connect to VM1 monitor, and start migration:
>
> > migrate tcp:0:4444
>
> 7. After a while, you will find that VM1 has been migrated to VM2,
> and the "ping" command continues running, perfectly.
>
>
> Note: this patch set has mostly been based on Victor Kaplansk's demo
> work (vhost-user-bridge) at QEMU project. I was thinking to add Victor
> as the co-author. Victor, what do you think of that? :)
Thanks for adding me to credits list!
-- Victor
>
> Comments are welcome!
>
> ---
> Yuanhan Liu (4):
> vhost: handle VHOST_USER_SET_LOG_BASE request
> vhost: introduce vhost_log_write
> vhost: log vring changes
> vhost: enable log_shmfd protocol feature
>
> lib/librte_vhost/rte_virtio_net.h | 35 ++++++++++++++
> lib/librte_vhost/vhost_rxtx.c | 70 ++++++++++++++++++---------
> lib/librte_vhost/vhost_user/vhost-net-user.c | 7 ++-
> lib/librte_vhost/vhost_user/vhost-net-user.h | 6 +++
> lib/librte_vhost/vhost_user/virtio-net-user.c | 44 +++++++++++++++++
> lib/librte_vhost/vhost_user/virtio-net-user.h | 5 +-
> lib/librte_vhost/virtio-net.c | 4 ++
> 7 files changed, 145 insertions(+), 26 deletions(-)
>
> --
> 1.9.0
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