Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756373AbbDVU7N (ORCPT ); Wed, 22 Apr 2015 16:59:13 -0400 Received: from mx1.redhat.com ([209.132.183.28]:58258 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752049AbbDVU7L (ORCPT ); Wed, 22 Apr 2015 16:59:11 -0400 Message-ID: <1429736339.121496.25.camel@redhat.com> Subject: Re: ioremap_uc() followed by set_memory_wc() - burrying MTRR From: Doug Ledford To: Jason Gunthorpe Cc: "Luis R. Rodriguez" , Andy Lutomirski , mike.marciniszyn@intel.com, infinipath@intel.com, linux-rdma@vger.kernel.org, awalls@md.metrocast.net, Toshi Kani , "H. Peter Anvin" , Ingo Molnar , "linux-kernel@vger.kernel.org" , Hal Rosenstock , Sean Hefty , Suresh Siddha , Rickard Strandqvist , Roland Dreier , Juergen Gross , Mauro Carvalho Chehab , Borislav Petkov , Mel Gorman , Vlastimil Babka , Davidlohr Bueso , Dave Hansen , Jean-Christophe Plagniol-Villard , Thomas Gleixner , Ville Syrj?l? , Linux Fbdev development list , linux-media@vger.kernel.org, X86 ML , mcgrof@do-not-panic.com Date: Wed, 22 Apr 2015 16:58:59 -0400 In-Reply-To: <20150422204637.GA29491@obsidianresearch.com> References: <20150421224601.GY5622@wotan.suse.de> <20150421225732.GA17356@obsidianresearch.com> <20150421233907.GA5622@wotan.suse.de> <20150422053939.GA29609@obsidianresearch.com> <20150422152328.GB5622@wotan.suse.de> <20150422161755.GA19500@obsidianresearch.com> <1429728791.121496.10.camel@redhat.com> <20150422204637.GA29491@obsidianresearch.com> Organization: Red Hat, Inc. Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-VQA/gkYPziMV8v3lRRct" Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2910 Lines: 77 --=-VQA/gkYPziMV8v3lRRct Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2015-04-22 at 14:46 -0600, Jason Gunthorpe wrote: > On Wed, Apr 22, 2015 at 02:53:11PM -0400, Doug Ledford wrote: >=20 > > To be precise, the split is that ipath powers the old HTX bus cards tha= t > > only work in AMD systems, qib is all PCI-e cards. I still have a few > > HTX cards, but I no longer have any systems with HTX slots, so we > > haven't even used this driver in testing for 3 or 4 years now. And > > these are all old SDR cards, where the performance numbers were 800MB/s > > with WC enabled, 50MB/s without it. >=20 > Wow, I doubt any HTX systems are still in any kind of use. >=20 > It would be a nice clean up to drop the PPC support out of this driver > too. PPC never had HTX. commit f6d60848baf9f4015c76c665791875ed623cd5b7 Author: Ralph Campbell Date: Thu May 6 17:03:19 2010 -0700 IB/ipath: Remove support for QLogic PCIe QLE devices =20 The ib_qib driver is taking over support for QLogic PCIe QLE devices, so remove support for them from ib_ipath. The ib_ipath driver now supports only the obsolete QLogic Hyper-Transport IB host channel adapter (model QHT7140). =20 Signed-off-by: Ralph Campbell Signed-off-by: Roland Dreier There you go. It's been HTX only since 2010, and those cards were already old then. I think we should seriously consider deprecating and then removing the driver. --=20 Doug Ledford GPG KeyID: 0E572FDD --=-VQA/gkYPziMV8v3lRRct Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABAgAGBQJVOAuTAAoJELgmozMOVy/d0LEQAMVVAGuJLGbahwXf7hHSTkRy vEh/Pckd/ASMkXvSEaROZvUhuwAv59q5HnDcvf2+SOgFjf8D1M2gaCXRYB1Y+rEW yfNK0wmubEDLw0wj8oh163X2/pzFtePJmYSVL486IMxkRrqSUllx+suvyOBStYu+ CUOMnwmef+KDMfvoNAoGAIyaz7OxBXGr9p4DZyHCu3FFU8QmHXpDOJ3HLiPIuylD xdXrO1WeJ+eGYJJ9qzb+TSFjRsaXGkLXybE4B4PTm7wOFMDFvHftDaHBhk3D21u7 Icl0752jfUkXepELkmuj3j3TEWYNl/rjeAORP96T42cMmHSFapJuOYvdO6pMv7pE 78/evMJhFC/JLqbdzUbE5b6yMVEE6MKeH0lAvA/n+aGVURVD1yH5sG/iQk5m74+C b4tlA2+vjjs4O6yFQnSrGCsPljaULe0TB/mgw9JVqI3e5Xf8tQzradTKSYw4MAYL 1Wf958c8eeTc0GEM/TJXFQJ5EX92uFgTrd1l/IWUVrGTMgvWvHITZ5ISGefMSLpk /7M8hypKpXMaft22ljoAwoGrsChtGgc0k/h8/MQGkkAF9VLOiga635euFM9fESbd l8WaVigHkWFco9O5gtBhlwObNCI1h9+2CXdGbDVmVlhcDFYbWFKoEx3IuqgL/A1q cVkb0VlPI2SN5qomWpBc =wa3i -----END PGP SIGNATURE----- --=-VQA/gkYPziMV8v3lRRct-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/