From: Jason Gunthorpe <jgg@nvidia.com>
To: Doug Ledford <doug.ledford@hpe.com>
Cc: Michael Margolin <mrgolin@amazon.com>,
leon@kernel.org, linux-rdma@vger.kernel.org, sleybo@amazon.com,
matua@amazon.com, gal.pressman@linux.dev,
Yonatan Nachum <ynachum@amazon.com>
Subject: Re: [PATCH for-next v2 1/5] RDMA/core: Add Completion Counters support
Date: Wed, 29 Apr 2026 22:49:22 -0300 [thread overview]
Message-ID: <20260430014922.GF3225388@nvidia.com> (raw)
In-Reply-To: <2bfaa4cc-8e4f-43ad-a483-36ac1ae3caea@hpe.com>
On Wed, Apr 29, 2026 at 06:50:54PM -0600, Doug Ledford wrote:
> 1) Make qp attachment optional
> 2) Extend create verb to differentiate between on-card counter with umem
> target and in-umem counter
> 3) Extend create verb to pass in optional trigger or wait capability to
> perform limited umem updates based upon passed in option
> 4) Modify read operation so that it can either return the value directly or
> just trigger an async update of a buffer backed counter (especially useful
> if the umem counter is on a GPU, is set for a triggered update, and you just
> want to force an immediate async update)
After all that is it still a "completion" counter? It seems like it is
counting something else than a shortcut to polling a CQ?
Jason
next prev parent reply other threads:[~2026-04-30 1:49 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-16 21:23 [PATCH for-next v2 0/5] Introduce Completion Counters Michael Margolin
2026-04-16 21:23 ` [PATCH for-next v2 1/5] RDMA/core: Add Completion Counters support Michael Margolin
2026-04-30 0:50 ` Doug Ledford
2026-04-30 1:49 ` Jason Gunthorpe [this message]
2026-04-30 15:38 ` Doug Ledford
2026-04-30 12:18 ` Michael Margolin
2026-04-30 19:09 ` Doug Ledford
2026-04-30 22:33 ` Sean Hefty
2026-05-04 12:51 ` Michael Margolin
2026-05-04 15:37 ` Sean Hefty
2026-04-16 21:23 ` [PATCH for-next v2 2/5] RDMA/core: Prevent destroying in-use completion counters Michael Margolin
2026-04-16 21:23 ` [PATCH for-next v2 3/5] RDMA/core: Add Completion Counters to resource tracking Michael Margolin
2026-04-16 21:23 ` [PATCH for-next v2 4/5] RDMA/efa: Update device interface Michael Margolin
2026-04-28 22:36 ` [PATCH for-next v2 0/5] Introduce Completion Counters Doug Ledford
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