Re: [PATCH-for-9.1 v2 2/3] migration: Remove RDMA protocol handling
on 4/10/2024 3:46 AM, Peter Xu wrote:
> Is there document/link about the unittest/CI for migration tests,
Why
> are those tests missing?
> Is it hard or very special to set up an environment for that? maybe we
> can help in this regards.
See tests/qtest/migration-test.c. We put most of our migration tests
there and that's covered in CI.
I think one major issue is CI systems don't normally have rdma devices.
Can rdma migration test be carried out without a real hardware?
Yeah, RXE aka. SOFT-RoCE is able to emulate the RDMA, for example
$ sudo rdma link add rxe_eth0 type rxe netdev eth0 # on host
then we can get a new RDMA interface "rxe_eth0".
This new RDMA interface is able to do the QEMU RDMA migration.
Also, the loopback(lo) device is able to emulate the RDMA interface
"rxe_lo", however when
I tried(years ago) to do RDMA migration over this
interface(rdma:127.0.0.1:3333) , it got something wrong.
So i gave up enabling the RDMA migration qtest at that time.
Thanks
Zhijian
>> It seems there can still be people joining this discussion. I'll hold off
>> a bit on merging this patch to provide enough window for anyone to chim in.
> Thx for discussion and understanding.
Thanks for all these inputs so far. These can help us make a wiser and
clearer step no matter which way we choose.