Hi Zhijian, On Mon, Aug 23, 2021 at 11:41 AM lizhij...@fujitsu.com <lizhij...@fujitsu.com> wrote: > > CCing Marcel > > > On 23/08/2021 11:33, Li Zhijian wrote: > > Previous qemu are facing 2 problems when migrating a fsdax memory backend > > with > > RDMA protocol. > > (1) ibv_reg_mr failed with Operation not supported > > (2) requester(source) side could receive RNR NAK. > > > > For the (1), we can try to register memory region with ODP feature which > > has already been implemented in some modern HCA hardware/drivers. > > For the (2), IB provides advise API to prefetch pages in specific memory > > region. It can help driver reduce the page fault on responder(destination) > > side during RDMA_WRITE. > > > > CC: marcel.apfelb...@gmail.com > > > > Li Zhijian (2): > > migration/rdma: Try to register On-Demand Paging memory region > > migration/rdma: advise prefetch write for ODP region > > > > migration/rdma.c | 117 +++++++++++++++++++++++++++++++++-------- > > migration/trace-events | 2 + > > 2 files changed, 98 insertions(+), 21 deletions(-) > >
Series Reviewed-by: Marcel Apfelbaum <marcel.apfelb...@gmail.com> Thanks, Marcel
