Re: [LSF/MM/BPF RFC PATCH 00/13]

[Leon Romanovsky <leon@kernel.org>]

On Tue, May 05, 2026 at 09:46:12AM +0200, Md Haris Iqbal wrote:
> Following a conversation with Bart yesterday, I am sending the RMR+BRMR
> code through patch for easier review.
> 
> The patches apply over the for-next branch of the block tree over commit
> 07dfa981ca3
> 
> For context,
> RMR (Reliable Multicast over RTRS) is a kernel module that provides
> active-active block-level replication over RDMA. It guarantees delivery
> of IO to a group of storage nodes and handles resynchronization of data
> directly between storage nodes without involving the compute client.
> 
> BRMR (Block device over RMR) sits on top of RMR and exposes a standard
> Linux block device (/dev/brmrX) backed by an RMR pool. Together, RMR and
> BRMR provide a single-hop replication and resynchronization solution for
> RDMA-connected storage clusters.
> 
> My session is on Wednesday, at 12 in the storage room (Istanbul).

To summarize the discussion:

1. Move as much logic as possible into the block layer; RDMA should serve
   strictly as a transport.
2. Identify another in‑kernel user of this functionality, and add support for
   it if required. At least accommodate potential users elsewhere in the
   kernel.

Thanks