Linux RDMA and InfiniBand development
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From: Christopher Lameter <cl@linux.com>
To: "Håkon Bugge" <haakon.bugge@oracle.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>,
	Mark Haywood <mark.haywood@oracle.com>,
	OFED mailing list <linux-rdma@vger.kernel.org>
Subject: Re: Is there a working cache for path record and lids etc for librdmacm?
Date: Tue, 24 Nov 2020 19:01:25 +0000 (UTC)	[thread overview]
Message-ID: <alpine.DEB.2.22.394.2011241859340.286936@www.lameter.com> (raw)
In-Reply-To: <648D2533-E8E8-4248-AF2D-C5F1F60E5BFC@oracle.com>

[-- Attachment #1: Type: text/plain, Size: 690 bytes --]

On Mon, 23 Nov 2020, Håkon Bugge wrote:

> > Got version 33.0 from Redhat with the option. Set it but ibacm still times
> > out when trying to contact the SM.
>
> Contact the peer ibacm, that is. Is it started?


It can contact the peer ibacm if its running on a particular host. Then
the resolution succeeds. But we want ibacm to talk to the subnet manager.

> And, ib_acme bypasses the kernel_only check. I assume a real app (e.g.,
> qperf <destination_ip> -cm1 rc_bw) would work, but incur an excess delay
> due to the ibacm timeout, before failing back to the kernel neighbour
> cache.

Ok. But what does it matter?


How do I figure out why ibacm is not talking to the subnet manager?

  reply	other threads:[~2020-11-24 19:01 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-17  2:57 Is there a working cache for path record and lids etc for librdmacm? Christopher Lameter
2020-11-17  8:46 ` Jens Domke
2020-11-17 14:20   ` Christopher Lameter
2020-11-17 19:33 ` Jason Gunthorpe
2020-11-20 18:05   ` Christopher Lameter
2020-11-20 18:34     ` Håkon Bugge
2020-11-22 12:49       ` Christopher Lameter
2020-11-22 15:50         ` Håkon Bugge
2020-11-22 19:22           ` Christopher Lameter
2020-11-23 12:50             ` Christopher Lameter
2020-11-23 19:01               ` Håkon Bugge
2020-11-24 19:01                 ` Christopher Lameter [this message]
2020-11-25  8:10                   ` Honggang LI
2020-11-25 16:43                     ` Christopher Lameter
2020-11-27 14:52                       ` Håkon Bugge
2020-11-30  8:24                         ` Christopher Lameter
2020-12-04 11:17                           ` Håkon Bugge
2020-12-05 11:50                             ` Christoph Lameter
2020-12-07 10:28                             ` Christoph Lameter
2020-12-07 21:08                               ` Mark Haywood
2020-12-08  8:59                                 ` Christoph Lameter

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