[$] Single-hop block replication with RMR and BRMR

How can cloud providers efficiently supply durable virtual block devices? RemoteDirect Memory Access (RDMA) provides a way for servers in a cluster to sharechunks of memory, but there still needs to be a protocol that operates on top ofRDMA to provide the guarantees expected of a block device. The kernel's RDMA transportlibrary (RTRS) provides a way to send messages via RDMA. Ipresented about twonew components built on top of RTRS at the 2026LinuxStorage, Filesystem, Memory Management and BPF Summit: Reliable Multicastover RTRS (RMR) and Block device over RMR (BRMR). These modules, which Iam working on with Jia Li, could be a way for cloud providers toexpose durable block devices with as little overhead as possible. To accomplishthat, however, we need some discussion and feedback from the community beforesending the modules upstream.