From mboxrd@z Thu Jan 1 00:00:00 1970 From: Or Gerlitz Subject: Re: [PATCH V2] IB/ipoib: Leave stale send-only multicast groups Date: Mon, 17 Jan 2011 13:30:09 +0200 Message-ID: <4D342841.7020700@voltaire.com> References: <4D34239D.9030004@Voltaire.COM> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4D34239D.9030004-hKgKHo2Ms0F+cjeuK/JdrQ@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Moni Shoua Cc: Roland Dreier , linux-rdma , Yossi Etigin List-Id: linux-rdma@vger.kernel.org Moni Shoua wrote: > Unlike with send/receive multicast groups, there is no indication for IPoIB > that a send-only multicast group is useless. Therefore, even a single packet > to a multicast destination leaves a multicast entry on the fabric until the > host interface is down. This causes an MGID leakage in the SM. Just few quick comments on the change-log: the SM doesn't control/manage MGIDs, its the application (ipoib in this case), so I assume you are referring to MLIDs. I believe that the Linux IB stack doesn't support send-only groups ala the IB spec, so you're talking on "stale groups" which are practically send-only, I would add that to the change log Or. -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html