From: Steve Wise <swise@opengridcomputing.com>
To: Sean Hefty <sean.hefty@intel.com>
Cc: Tom Tucker <tom@opengridcomputing.com>,
Andrew Morton <akpm@osdl.org>,
netdev@vger.kernel.org, rdreier@cisco.com,
linux-kernel@vger.kernel.org, openib-general@openib.org
Subject: RE: [openib-general] [PATCH v2 1/2] iWARP Connection Manager.
Date: Tue, 13 Jun 2006 16:46:36 -0500 [thread overview]
Message-ID: <1150235196.17394.91.camel@stevo-desktop> (raw)
In-Reply-To: <000001c68f31$78910fe0$24268686@amr.corp.intel.com>
On Tue, 2006-06-13 at 14:36 -0700, Sean Hefty wrote:
> >> Er...no. It will lose this event. Depending on the event...the carnage
> >> varies. We'll take a look at this.
> >>
> >
> >This behavior is consistent with the Infiniband CM (see
> >drivers/infiniband/core/cm.c function cm_recv_handler()). But I think
> >we should at least log an error because a lost event will usually stall
> >the rdma connection.
>
> I believe that there's a difference here. For the Infiniband CM, an allocation
> error behaves the same as if the received MAD were lost or dropped. Since MADs
> are unreliable anyway, it's not so much that an IB CM event gets lost, as it
> doesn't ever occur. A remote CM should retry the send, which hopefully allows
> the connection to make forward progress.
>
hmm. Ok. I see. I misunderstood the code in cm_recv_handler().
Tom and I have been talking about what we can do to not drop the event.
Stay tuned.
Steve.
next prev parent reply other threads:[~2006-06-13 21:46 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-07 20:06 [PATCH v2 0/2][RFC] iWARP Core Support Steve Wise
2006-06-07 20:06 ` [PATCH v2 1/2] iWARP Connection Manager Steve Wise
2006-06-08 7:54 ` Andrew Morton
2006-06-12 15:54 ` Tom Tucker
2006-06-13 20:34 ` Steve Wise
2006-06-13 21:36 ` [openib-general] " Sean Hefty
2006-06-13 21:46 ` Steve Wise [this message]
2006-06-14 16:11 ` Steve Wise
2006-06-07 20:06 ` [PATCH v2 2/2] iWARP Core Changes Steve Wise
2006-06-07 22:13 ` Tom Tucker
-- strict thread matches above, loose matches on Subject: below --
2006-06-14 18:06 [openib-general] [PATCH v2 1/2] iWARP Connection Manager Caitlin Bestler
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