Hi Yuanhan, > -----Original Message----- > From: Yuanhan Liu [mailto:yuanhan.liu at linux.intel.com] > Sent: Thursday, December 17, 2015 3:12 AM > To: dev at dpdk.org > Cc: Xie, Huawei <huawei.xie at intel.com>; Michael S. Tsirkin > <mst at redhat.com>; Victor Kaplansky <vkaplans at redhat.com>; Iremonger, > Bernard <bernard.iremonger at intel.com>; Pavel Fedin > <p.fedin at samsung.com>; Peter Xu <peterx at redhat.com>; Yuanhan Liu > <yuanhan.liu at linux.intel.com>; Chen, Zhihui <zhihui.chen at intel.com>; > Yang, Maggie <maggie.yang at intel.com> > Subject: [PATCH v2 0/6] vhost-user live migration support > > This patch set adds the vhost-user live migration support. > > The major task behind that is to log pages we touched during live migration, > including used vring and desc buffer. So, this patch set 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 logs changes we made to vring desc buffer. > > - Patch 5 and 6 add some feature bits related to live migration. > >
The follow test guide should probably be added the DPDK doc files. It could be added to the sample app guide or the programmers guide. There is already a Vhost Library section in the programmers guide and A Vhost Sample Application section in the sample app guide. > A simple test guide (on same host) > ================================== > > The following test is based on OVS + DPDK (check [0] for how to setup OVS + > DPDK): > > [0]: http://wiki.qemu.org/Features/vhost-user-ovs-dpdk > > Here is the rough test guide: > > 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. > > > Cc: Chen Zhihui <zhihui.chen at intel.com> > Cc: Yang Maggie <maggie.yang at intel.com> > --- > Yuanhan Liu (6): > vhost: handle VHOST_USER_SET_LOG_BASE request > vhost: introduce vhost_log_write > vhost: log used vring changes > vhost: log vring desc buffer changes > vhost: claim that we support GUEST_ANNOUNCE feature > vhost: enable log_shmfd protocol feature > > lib/librte_vhost/rte_virtio_net.h | 36 ++++++++++- > lib/librte_vhost/vhost_rxtx.c | 88 > +++++++++++++++++++-------- > 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 | 48 +++++++++++++++ > lib/librte_vhost/vhost_user/virtio-net-user.h | 5 +- > lib/librte_vhost/virtio-net.c | 5 ++ > 7 files changed, 165 insertions(+), 30 deletions(-) > > -- > 1.9.0 Regards, Bernard.
