Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752220AbcDORox (ORCPT ); Fri, 15 Apr 2016 13:44:53 -0400 Received: from mga01.intel.com ([192.55.52.88]:25972 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750709AbcDORov convert rfc822-to-8bit (ORCPT ); Fri, 15 Apr 2016 13:44:51 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,488,1455004800"; d="scan'208";a="785749105" From: "Woodruff, Robert J" To: Christoph Hellwig , Leon Romanovsky CC: "Weiny, Ira" , Jason Gunthorpe , "Dalessandro, Dennis" , "dledford@redhat.com" , "linux-rdma@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" , "torvalds@linux-foundation.org" , "viro@zeniv.linux.org.uk" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH 0/7] IB/hfi1: Remove write() and use ioctl() for user access Thread-Topic: [PATCH 0/7] IB/hfi1: Remove write() and use ioctl() for user access Thread-Index: AQHRlmTH3lo4j/o+xkqorfwP2c91VJ+KIsIAgAARhICAAKs/AIAAzcWAgAAUToCAAAD2gP//jGJw Date: Fri, 15 Apr 2016 17:44:48 +0000 Message-ID: <9C6B67F36DCAFC479B1CF6A967258A8C7DDAAE43@ORSMSX115.amr.corp.intel.com> References: <20160414153727.6387.96381.stgit@scvm10.sc.intel.com> <20160414164550.GC6247@obsidianresearch.com> <20160414174830.GA11641@rhel.sc.intel.com> <20160415040126.GB10689@leon.nu> <20160415161754.GA21549@rhel> <20160415173035.GC10689@leon.nu> <20160415173401.GA10868@infradead.org> In-Reply-To: <20160415173401.GA10868@infradead.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ctpclassification: CTP_IC x-titus-metadata-40: eyJDYXRlZ29yeUxhYmVscyI6IiIsIk1ldGFkYXRhIjp7Im5zIjoiaHR0cDpcL1wvd3d3LnRpdHVzLmNvbVwvbnNcL0ludGVsMyIsImlkIjoiMmY5MjQyYTEtNTBlMC00ZWYyLWIzMTUtZTA1ZjM2ZGRiNmE1IiwicHJvcHMiOlt7Im4iOiJDVFBDbGFzc2lmaWNhdGlvbiIsInZhbHMiOlt7InZhbHVlIjoiQ1RQX0lDIn1dfV19LCJTdWJqZWN0TGFiZWxzIjpbXSwiVE1DVmVyc2lvbiI6IjE1LjkuNi42IiwiVHJ1c3RlZExhYmVsSGFzaCI6InEwRlRFYnZNTEpLekdxd2hHcTJmZWsxT1BqbXVUc1BSclJRYnhDZTVTbFE9In0= x-originating-ip: [10.22.254.139] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 511 Lines: 5 > I fear it's kfabrics, which is an entirely crackpot idea and a total non-starter, but for some reason Intel and their buddies keep wasting time on it. What is being discussed her is not kfabrics. That is a totally different out of kernel pathfinding project at this point. What is being discussed here is how to best solve the write/writev issue with the PSM interface. The code submitted was to move to IOCTL instead, but people like Jason have suggested routing the IOCTLs through the verbs layer instead.