On 9/20/22 7:32 PM, Leon Romanovsky wrote: > On Fri, Sep 09, 2022 at 05:38:22PM +0800, Cheng Xu wrote: >> Hardware now support jumbo frame for RDMA. So we introduce a new CMDQ >> message to support mtu change notification. >> <...> > > I don't see any backward compatibility here. How can you make sure that > new code that supports MTU change works correctly on old FW/device? > In this case, driver needn't to consider backward compatibility. ERDMA hardware is programmable part of our iaas infrastructure, and can be hot-update without BMs/VMs awareness.Before I submitted this patch, all the FWs has been updated, and support this feature, no old FWs exist. Thanks, Cheng Xu
