From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp.codeaurora.org by pdx-caf-mail.web.codeaurora.org (Dovecot) with LMTP id 7gOrONMZHVv1JQAAmS7hNA ; Sun, 10 Jun 2018 12:30:12 +0000 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id C9C2D607E7; Sun, 10 Jun 2018 12:30:11 +0000 (UTC) Authentication-Results: smtp.codeaurora.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="nhU1puW6" X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,T_DKIMWL_WL_HIGH autolearn=ham autolearn_force=no version=3.4.0 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by smtp.codeaurora.org (Postfix) with ESMTP id 41CE6604D4; Sun, 10 Jun 2018 12:30:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 41CE6604D4 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753937AbeFJMZL (ORCPT + 25 others); Sun, 10 Jun 2018 08:25:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:51200 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753899AbeFJMZJ (ORCPT ); Sun, 10 Jun 2018 08:25:09 -0400 Received: from localhost (unknown [193.47.165.251]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 621A320858; Sun, 10 Jun 2018 12:25:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1528633509; bh=xJq0wIlGVkcvIwc8xZOFLUreEwnzLuyg/umrNdSnZ9Y=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=nhU1puW66AHfD5TPMjuQWdkyCIltFJxuZWVHQd3tZgY0iqNkrUVPfiHlyfK0PL3AN g68PTqNML3r4G74+ss6DivdxrQCCfEHl+iuy8wRsLCvyhowRg6LsmD1jKocM1gOonX QWjqmzyi409DZ9D8hlcF1A1JWQsNhZ0YYU5Nugo0= Date: Sun, 10 Jun 2018 15:25:05 +0300 From: Leon Romanovsky To: Matthew Wilcox Cc: hans.westgaard.ry@oracle.com, Doug Ledford , Jason Gunthorpe , Matthew Wilcox , linux-rdma@vger.kernel.org, =?iso-8859-1?Q?H=E5kon?= Bugge , Parav Pandit , Jack Morgenstein , Pravin Shedge , linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/2] IB/mad: Use IDR for agent IDs Message-ID: <20180610122505.GM12407@mtr-leonro.mtl.com> References: <20180608174218.32455-1-willy@infradead.org> <20180608174218.32455-3-willy@infradead.org> <20180610063028.GH12407@mtr-leonro.mtl.com> <20180610104305.GA9284@bombadil.infradead.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="L2Brqb15TUChFOBK" Content-Disposition: inline In-Reply-To: <20180610104305.GA9284@bombadil.infradead.org> User-Agent: Mutt/1.9.5 (2018-04-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --L2Brqb15TUChFOBK Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Sun, Jun 10, 2018 at 03:43:05AM -0700, Matthew Wilcox wrote: > 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. Just replace "mlx4 bug" with something like "to comply with mlx4 implementation". > > > 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. It sounds like more than enough. 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