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.