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[46.22.139.233]) by mx.google.com with ESMTPS id j3si3220811ejs.316.2019.04.24.07.20.39 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 24 Apr 2019 07:20:40 -0700 (PDT) Received-SPF: pass (google.com: domain of mgorman@techsingularity.net designates 46.22.139.233 as permitted sender) client-ip=46.22.139.233; Authentication-Results: mx.google.com; spf=pass (google.com: domain of mgorman@techsingularity.net designates 46.22.139.233 as permitted sender) smtp.mailfrom=mgorman@techsingularity.net Received: from mail.blacknight.com (pemlinmail03.blacknight.ie [81.17.254.16]) by outbound-smtp16.blacknight.com (Postfix) with ESMTPS id 894251C1FD2 for ; Wed, 24 Apr 2019 15:20:39 +0100 (IST) Received: (qmail 25928 invoked from network); 24 Apr 2019 14:20:38 -0000 Received: from unknown (HELO techsingularity.net) (mgorman@techsingularity.net@[37.228.225.79]) by 81.17.254.9 with ESMTPSA (AES256-SHA encrypted, authenticated); 24 Apr 2019 14:20:38 -0000 Date: Wed, 24 Apr 2019 15:20:37 +0100 From: Mel Gorman To: Mike Rapoport Cc: x86@kernel.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Christoph Hellwig , Matthew Wilcox , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/2] x86/Kconfig: deprecate DISCONTIGMEM support for 32-bit Message-ID: <20190424142037.GV18914@techsingularity.net> References: <1556112252-9339-1-git-send-email-rppt@linux.ibm.com> <1556112252-9339-3-git-send-email-rppt@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <1556112252-9339-3-git-send-email-rppt@linux.ibm.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Apr 24, 2019 at 04:24:12PM +0300, Mike Rapoport wrote: > Mel Gorman says: > 32-bit NUMA systems should be non-existent in practice. The last NUMA > system I'm aware of that was both NUMA and 32-bit only died somewhere > between 2004 and 2007. If someone is running a 64-bit capable system in > 32-bit mode with NUMA, they really are just punishing themselves for fun. > > Mark DISCONTIGMEM broken for now and remove it in a couple of releases. > > Suggested-by: Christoph Hellwig > Suggested-by: Mel Gorman > Signed-off-by: Mike Rapoport It was really Christoph that suggested marking it broken but I do agree that it should be marked broken to see if anyone complains and if not, there is no real reason to keep discontig available on x86. Acked-by: Mel Gorman -- Mel Gorman SUSE Labs