linux-kernel - Re: [PATCH 2/2] IB/mad: Use IDR for agent IDs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20180610104305.GA9284@bombadil.infradead.org>
Date:   Sun, 10 Jun 2018 03:43:05 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     hans.westgaard.ry@...cle.com, Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Matthew Wilcox <mawilcox@...rosoft.com>,
        linux-rdma@...r.kernel.org,
        Håkon Bugge <haakon.bugge@...cle.com>,
        Parav Pandit <parav@...lanox.com>,
        Jack Morgenstein <jackm@....mellanox.co.il>,
        Pravin Shedge <pravin.shedge4linux@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] IB/mad: Use IDR for agent IDs

On Sun, Jun 10, 2018 at 09:30:28AM +0300, Leon Romanovsky wrote:
> 1. IBTA spec doesn't talk at all about the size of TransactionID, more
> on that in section "13.4.6.4 TRANSACTION ID USAGE", the specification
> says: "The contents of the TransactionID (TID) field are implementation-
> dependent. So let's don't call it mlx4 bug.

I was loosely paraphrasing the original bug report; suggested rewording
of the comments gratefully accepted.

> 2. The current implementation means that in mlx5-only network we will
> still have upto (1 << 24) TIDs. I don't know if it is really important,
> but worth to mention.

Actually, the TIDs will be up to 2^56.  We're limited to 2^24 clients,
each of which can send up to 2^32 messages.