linux-kernel - Re: [RFC] ib_srpt: initial .40-rc1 drivers/infiniband/ulp/srpt merge

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Message-ID: <20110518170556.GB2595@obsidianresearch.com>
Date:	Wed, 18 May 2011 11:05:56 -0600
From:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
To:	Bart Van Assche <bvanassche@....org>
Cc:	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-rmda <linux-rdma@...r.kernel.org>,
	Roland Dreier <roland@...estorage.com>,
	Vu Pham <vu@...lanox.com>, David Dillow <dillowda@...l.gov>,
	James Bottomley <James.Bottomley@...senpartnership.com>
Subject: Re: [RFC] ib_srpt: initial .40-rc1 drivers/infiniband/ulp/srpt
 merge

On Wed, May 18, 2011 at 06:59:36PM +0200, Bart Van Assche wrote:

> As far as I know InfiniBand HCAs have either one or two ports. If
> there are two ports present, at most one is active at any time.

This is not true, many installations run dual rail IB with a desire
for both ports to be active and handling traffic at once. Not sure how
this translates to SRPT, but a good goal would be for a SRPT target to
be available on both HCA ports and support APM between them, at the
discretion of the client.

Jason
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