Re: [PATCH for-next v8 0/5] Introduce Completion Counters

[Leon Romanovsky <leon@kernel.org>]

On Wed, Jul 15, 2026 at 07:39:58AM +0000, Michael Margolin wrote:
> On Wed, Jul 08, 2026 at 12:36:40PM +0000, Michael Margolin wrote:
> > On Tue, Jul 07, 2026 at 08:34:22PM +0000, Michael Margolin wrote:
> > > Add core infrastructure for Completion Counters, a light-weight
> > > alternative to polling CQ for tracking operation completions. The
> > > related rdma-core support is linked in [1].
> > > 
> > > Define the UVERBS_OBJECT_COMP_CNTR ioctl object with create, destroy,
> > > modify and read methods for both success and error counters. Add a QP
> > > attach method on the QP object to associate a completion counter with a
> > > queue pair.
> > > 
> > > Add EFA Completion Counters support as first implementer.
> > > 
> > > [1] https://github.com/linux-rdma/rdma-core/pull/1701
> > > 
> > 
> > Walked over Sashiko's comments, most of them are about usage count
> > which is handled in a follow-up patch in the series. The others don't
> > seem to be real issues.
> > 
> > https://sashiko.dev/#/patchset/20260707203427.6923-1-mrgolin%40amazon.com
> > 
> > Jason, Leon do you have any other comments?
> > 
> > Michael
> >
> 
> I need your feedback on this series, specifically on the ABI changes
> (and libibverbs), to unblock progress in upper layers that depend on
> this support (libfabric, NCCL).

We are primarily waiting for the relevant rdma-core PR to be ready.

Thanks