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From: Leon Romanovsky <leon@kernel.org>
To: Christoph Lameter <cl@gentwo.de>
Cc: linux-rdma@vger.kernel.org
Subject: Re: [PATCH][FIX] ROCE Multicast: Do not send IGMP leaves for sendonly Multicast groups
Date: Mon, 13 Sep 2021 13:38:43 +0300	[thread overview]
Message-ID: <YT8qM0IpIslXL4Ni@unreal> (raw)
In-Reply-To: <alpine.DEB.2.22.394.2109081340540.668072@gentwo.de>

On Wed, Sep 08, 2021 at 01:43:28PM +0200, Christoph Lameter wrote:
> ROCE uses IGMP for Multicast instead of the native Infiniband system where
> joins are required in order to post messages on the Multicast group.

According to the IBTA v1.5, there is no need to join multicast group to
send messages.

 10.5.2 MULTICAST WORK REQUESTS
 10.5.2.1 IBA UNRELIABLE MULTICAST WORK REQUESTS
  ...
  A QP is not required to be attached to a Multicast Group
  in order to initiate an IBA Unreliable Multicast Work Request.

Did I look in wrong place?

Thanks

  reply	other threads:[~2021-09-13 10:38 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-08 11:43 Christoph Lameter
2021-09-13 10:38 ` Leon Romanovsky [this message]
2021-09-14 18:38   ` Jason Gunthorpe
2021-09-15 19:44   ` Christoph Lameter
2021-09-14 18:57 ` Jason Gunthorpe

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