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Date: Fri, 27 Mar 2015 11:47:27 -0600 From: Jason Gunthorpe <jgunthorpe@...idianresearch.com> To: "ira.weiny" <ira.weiny@...el.com> Cc: Michael Wang <yun.wang@...fitbricks.com>, Roland Dreier <roland@...nel.org>, Sean Hefty <sean.hefty@...el.com>, Hal Rosenstock <hal.rosenstock@...il.com>, linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org, linux-nfs@...r.kernel.org, netdev@...r.kernel.org, "J. Bruce Fields" <bfields@...ldses.org>, Trond Myklebust <trond.myklebust@...marydata.com>, "David S. Miller" <davem@...emloft.net>, Or Gerlitz <ogerlitz@...lanox.com>, Moni Shoua <monis@...lanox.com>, PJ Waskiewicz <pj.waskiewicz@...idfire.com>, Tatyana Nikolova <Tatyana.E.Nikolova@...el.com>, Yan Burman <yanb@...lanox.com>, Jack Morgenstein <jackm@....mellanox.co.il>, Bart Van Assche <bvanassche@....org>, Yann Droneaud <ydroneaud@...eya.com>, Colin Ian King <colin.king@...onical.com>, Majd Dibbiny <majd@...lanox.com>, Jiri Kosina <jkosina@...e.cz>, Matan Barak <matanb@...lanox.com>, Alex Estrin <alex.estrin@...el.com>, Doug Ledford <dledford@...hat.com>, Eric Dumazet <edumazet@...gle.com>, Erez Shitrit <erezsh@...lanox.com>, Sagi Grimberg <sagig@...lanox.com>, Haggai Eran <haggaie@...lanox.com>, Shachar Raindel <raindel@...lanox.com>, Mike Marciniszyn <mike.marciniszyn@...el.com>, Steve Wise <swise@...ngridcomputing.com>, Tom Tucker <tom@....us>, Chuck Lever <chuck.lever@...cle.com> Subject: Re: [RFC PATCH 07/11] IB/Verbs: Use management helper has_mcast() and, cap_mcast() for mcast-check On Fri, Mar 27, 2015 at 01:05:08PM -0400, ira.weiny wrote: > > But it seems redudent, since mcast_add_one will already not add a port that is > > not IB, so mcast_event_handler is not callable. Something to do with > > rocee/ib switching? > > I'm not sure about this either. This check seems to be necessary only on a > per-port level. It does seem apparent that one can't go from Eth to IB. What > happens if you go from IB to Eth on the port? Hmm... I see a mlx4_change_port_types which ultimately calls ib_unregister_device, which suggests the port type doesn't change at runtime (yay) So maybe these checks really are redundant? Jason -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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