From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ig0-f170.google.com (mail-ig0-f170.google.com [209.85.213.170]) by kanga.kvack.org (Postfix) with ESMTP id ABB2C6B0035 for ; Mon, 25 Aug 2014 19:55:57 -0400 (EDT) Received: by mail-ig0-f170.google.com with SMTP id h3so4936417igd.1 for ; Mon, 25 Aug 2014 16:55:57 -0700 (PDT) Received: from qmta09.westchester.pa.mail.comcast.net (qmta09.westchester.pa.mail.comcast.net. [2001:558:fe14:43:76:96:62:96]) by mx.google.com with ESMTP id fm20si1233656icb.63.2014.08.25.16.55.56 for ; Mon, 25 Aug 2014 16:55:56 -0700 (PDT) Message-ID: <53FBCD09.1050003@gentoo.org> Date: Mon, 25 Aug 2014 19:55:53 -0400 From: Joshua Kinard MIME-Version: 1.0 Subject: Re: [PATCH v4 0/2] mm/highmem: make kmap cache coloring aware References: <1406941899-19932-1-git-send-email-jcmvbkbc@gmail.com> <20140825171600.GH25892@linux-mips.org> In-Reply-To: <20140825171600.GH25892@linux-mips.org> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Ralf Baechle , Max Filippov Cc: linux-xtensa@linux-xtensa.org, Chris Zankel , Marc Gauthier , linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-mips@linux-mips.org, linux-kernel@vger.kernel.org, David Rientjes , Andrew Morton , Leonid Yegoshin , Steven Hill On 08/25/2014 13:16, Ralf Baechle wrote: > On Sat, Aug 02, 2014 at 05:11:37AM +0400, Max Filippov wrote: > >> this series adds mapping color control to the generic kmap code, allowing >> architectures with aliasing VIPT cache to use high memory. There's also >> use example of this new interface by xtensa. > > I haven't actually ported this to MIPS but it certainly appears to be > the right framework to get highmem aliases handled on MIPS, too. > > Though I still consider increasing PAGE_SIZE to 16k the preferable > solution because it will entirly do away with cache aliases. Won't setting PAGE_SIZE to 16k break some existing userlands (o32)? I use a 4k PAGE_SIZE because the last few times I've tried 16k or 64k, init won't load (SIGSEGVs or such, which panicks the kernel). -- Joshua Kinard Gentoo/MIPS kumba@gentoo.org 4096R/D25D95E3 2011-03-28 "The past tempts us, the present confuses us, the future frightens us. And our lives slip away, moment by moment, lost in that vast, terrible in-between." --Emperor Turhan, Centauri Republic -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org