Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Mon, 30 Apr 2018 08:49:30 -0600
From:   Jason Gunthorpe <jgg@ziepe.ca>
To:     jackm <jackm@dev.mellanox.co.il>
Cc:     =?utf-8?B?SMOla29u?= Bugge <haakon.bugge@oracle.com>,
        Doug Ledford <dledford@redhat.com>,
        Don Hiatt <don.hiatt@intel.com>,
        Dasaratharaman Chandramouli 
        <dasaratharaman.chandramouli@intel.com>,
        Ira Weiny <ira.weiny@intel.com>,
        Sean Hefty <sean.hefty@intel.com>,
        OFED mailing list <linux-rdma@vger.kernel.org>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] IB/core: Make ib_mad_client_id atomic
Message-ID: <20180430144930.GB26895@ziepe.ca>
References: <20180418142450.15581-1-Haakon.Bugge@oracle.com>
 <1524196555.11756.30.camel@redhat.com>
 <20180420153451.GF30433@ziepe.ca>
 <50E3FE4A-2C6E-4493-92E1-383C349FAE3A@oracle.com>
 <20180423221618.0000795d@dev.mellanox.co.il>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20180423221618.0000795d@dev.mellanox.co.il>
User-Agent: Mutt/1.5.24 (2015-08-30)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Mon, Apr 23, 2018 at 10:16:18PM +0300, jackm wrote:

> > > TIDs need to be globally unique on the entire machine.  

> Jason, that is not exactly correct.

The expecation for /dev/umad users is that they all receive locally
unique TID prefixes. The kernel may be OK to keep things port-specific
but it is slightly breaking the API we are presenting to userspace to
allow them to alias..

Jason