Re: [Qemu-devel] [PATCH v1 0/2] Add live migration support in the PVRDMA device

[Marcel Apfelbaum <marcel.apfelbaum@gmail.com>]

Hi Sukrit,

On 8/28/19 5:23 PM, Sukrit Bhatnagar wrote:
> This series enables the migration of various GIDs used by the device.
> This is in addition to the successful migration of PCI and MSIX states
> as well as various DMA addresses and ring page information.
>      
> We have a setup having two hosts and two VMs running atop them.
> Migrations are performed over the local network.
>
> We also have performed various ping-pong tests (ibv_rc_pingpong) in the
> guest(s) after adding GID migration support and this is the current status:
> - ping-pong to localhost succeeds, when performed before starting the
>    migration and after the completion of migration.
> - ping-pong to a peer succeeds, both before and after migration as above,
>    provided that both VMs are running on/migrated to the same host.
>    So, if two VMs were started on two different hosts, and one of them
>    was migrated to the other host, the ping-pong was successful.
>    Similarly, if two VMs are migrated to the same host, then after migration,
>    the ping-pong was successful.
> - ping-pong to a peer on the remote host is not working as of now.
>      
> Our next goal is to achieve successful migration with live traffic.
>      

Nice work!
I am sorry for the GSOC program interruption and congrats
on your decision to continue the project!

Thanks,
Marcel

> This is the same as the RFC v3 series posted earlier:
> https://lists.gnu.org/archive/html/qemu-devel/2019-07/msg04752.html
> https://lists.gnu.org/archive/html/qemu-devel/2019-07/msg04753.html
> https://lists.gnu.org/archive/html/qemu-devel/2019-07/msg04754.html
>
>
> Sukrit Bhatnagar (2):
>    hw/pvrdma: make DSR mapping idempotent in load_dsr()
>    hw/pvrdma: add live migration support
>
>   hw/rdma/vmw/pvrdma_main.c | 94 +++++++++++++++++++++++++++++++++++----
>   1 file changed, 86 insertions(+), 8 deletions(-)
>