From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steve Wise Subject: Re: [PATCH v4 4/6] infiniband: cxgb4: Eliminate duplicate barriers on weakly-ordered archs Date: Thu, 22 Mar 2018 11:28:29 -0500 Message-ID: <52cbc9d7-5a6b-5c8b-b930-058f5be62079@opengridcomputing.com> References: <1521514068-8856-5-git-send-email-okaya@codeaurora.org> <201803221430.P43GJl9U%fengguang.wu@intel.com> <3664b253c730dbf83f4528acaedb3a88@codeaurora.org> <3e9c006e4541acbce11743dbda553e84@codeaurora.org> <03d201d3c1eb$b71fb460$255f1d20$@opengridcomputing.com> <83484a3f-d3f7-d763-e4f8-e4fec3bb8cc2@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <83484a3f-d3f7-d763-e4f8-e4fec3bb8cc2@codeaurora.org> Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Sinan Kaya , 'kbuild test robot' Cc: sulrich@codeaurora.org, 'Casey Leedom' , 'Steve Wise' , linux-rdma@vger.kernel.org, linux-arm-msm@vger.kernel.org, timur@codeaurora.org, linux-kernel@vger.kernel.org, 'Jason Gunthorpe' , 'Doug Ledford' , kbuild-all@01.org, 'Michael Werner' , linux-arm-kernel@lists.infradead.org List-Id: linux-arm-msm@vger.kernel.org On 3/22/2018 9:52 AM, Sinan Kaya wrote: > On 3/22/2018 9:40 AM, Steve Wise wrote: >> I think all these iw_cxgb4 changes should be reverted until we really have a >> plan for multi-platform that works. > I know you are looking to have support for PowerPC. > > Isn't this a PowerPC problem? Why penalize other architectures? > > Do you see anything wrong with the code itself? I worry it breaks PPC. > I started this thread with the PowerPC develoeprs on your request. > "RFC on writel and writel_relaxed" > > They are looking into adding the relaxed API support. Support can come > in later. Why block this change now? > > benh@kernel.crashing.org: > "I've been wanting to implement the relaxed accessors for a while but > was battling with this to try to also better support WC, and due to > other commitments, this somewhat fell down the cracks." > > I have seen four different responses on this thread. Since this is an > architecture change it will take a while to get the semantics right. > It won't happen in the new few days. I appreciate you doing this.