From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Gunthorpe Subject: Re: ioremap_uc() followed by set_memory_wc() - burrying MTRR Date: Tue, 21 Apr 2015 23:39:39 -0600 Message-ID: <20150422053939.GA29609@obsidianresearch.com> References: <20150421224601.GY5622@wotan.suse.de> <20150421225732.GA17356@obsidianresearch.com> <20150421233907.GA5622@wotan.suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20150421233907.GA5622-B4tOwbsTzaBolqkO4TVVkw@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: "Luis R. Rodriguez" Cc: Andy Lutomirski , mike.marciniszyn-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, infinipath-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, awalls-Xoej9cPu4Z+RGvkDC/A1pg@public.gmane.org, Toshi Kani , "H. Peter Anvin" , Ingo Molnar , "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.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 List-Id: linux-rdma@vger.kernel.org On Wed, Apr 22, 2015 at 01:39:07AM +0200, Luis R. Rodriguez wrote: > > Mike, do you think the time is right to just remove the iPath driver? > > With PAT now being default the driver effectively won't work > with write-combining on modern kernels. Even if systems are old > they likely had PAT support, when upgrading kernels PAT will work > but write-combing won't on ipath. Sorry, do you mean the driver already doesn't get WC? Or do you mean after some more pending patches are applied? Jason -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html