From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A1CCECAC5A0 for ; Thu, 18 Sep 2025 13:34:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=2WK7RF7NsYG+8NsyTTvySh7GNGT5jm6UcDa778flAEQ=; b=mFcb/OSB7bVHrI4nr/caHPfqSJ Db7ZdrnNH7NOhFi+G/atAzNg4YxobOFQYLbvZFvAhVu3RHE9sqOHGqyuQkkzyPQyp/a/k6YQdEwag eQAb8gqaqz2/qjstd+bYQr1LYRzZqGekTKafIdROY18bVh3kviKX+BWRSDpwaUUSjZ4z4fdXHWt5J Y4/ix3La0CdjIdiIlMGrFjvh9Xtp3JG0wL9Xrar8y7P0YnelOrGWX8dWRZwxZGpKYo9wrKNlpFZPv BYRqESjnBXHQ5qVY7MrkchI1KY14LwvekE2mNM1ioLmR1gwtuciM+Lmqta7jLWuuebEcJZ38+6BFA iFvP3zDg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uzEmb-0000000HZ4R-1Zvg; Thu, 18 Sep 2025 13:34:45 +0000 Received: from vps0.lunn.ch ([156.67.10.101]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uzEmY-0000000HZ2L-2evh; Thu, 18 Sep 2025 13:34:43 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lunn.ch; s=20171124; h=In-Reply-To:Content-Disposition:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:From:Sender:Reply-To:Subject: Date:Message-ID:To:Cc:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:Content-Disposition:In-Reply-To:References; bh=2WK7RF7NsYG+8NsyTTvySh7GNGT5jm6UcDa778flAEQ=; b=mffiEw3N0Xsy0iehgYkPk5d+dg sWKIhv5XK/zUNW+x7cpwzMKn+fWVigxBkekrLwF/YIOd76oce1YtRzHGNOghxSvsx4TZKrO8BB5yX oA6G/OA6kjESeDYNowdA/HoKupolfgZZgm9ZJ1RTWZMa7p8eDc9puB5qodRd9gcxhoms=; Received: from andrew by vps0.lunn.ch with local (Exim 4.94.2) (envelope-from ) id 1uzEmL-008pSt-MZ; Thu, 18 Sep 2025 15:34:29 +0200 Date: Thu, 18 Sep 2025 15:34:29 +0200 From: Andrew Lunn To: Arnd Bergmann Cc: Jason Gunthorpe , ksummit@lists.linux.dev, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, imx@lists.linux.dev, Christophe Leroy , Richard Weinberger , Lucas Stach , Linus Walleij , Geert Uytterhoeven , Ankur Arora , David Hildenbrand , Mike Rapoport , Lorenzo Stoakes , Matthew Wilcox , Andrew Morton , "Liam R. Howlett" , Vlastimil Babka , Suren Baghdasaryan , Ira Weiny , Nishanth Menon , Heiko =?iso-8859-1?Q?St=FCbner?= , Alexander Sverdlin , "Chester A. Unal" , Sergio Paracuellos , Andreas Larsson Subject: Re: [TECH TOPIC] Reaching consensus on CONFIG_HIGHMEM phaseout Message-ID: References: <4ff89b72-03ff-4447-9d21-dd6a5fe1550f@app.fastmail.com> <20250917125951.GA1390993@nvidia.com> <02b0f383-1c43-4eeb-a76f-830c2970b833@app.fastmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <02b0f383-1c43-4eeb-a76f-830c2970b833@app.fastmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250918_063442_672280_E6A43557 X-CRM114-Status: GOOD ( 10.68 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org > * Marvell mv78xx0 and kirkwood (armv5 pj1) were fairly > powerful in 2008 and could support at least 1GB of RAM, > but I only found one machine (OpenBlocks A7) that does > this. It's unclear if anyone is still updating kernels > on this machine, but they could /probably/ use > VMSPLIT_3G_OPT if they do. If i remember correctly, there was a design issue with the OpenBlocks A7, and it would not run with its full amount of memory. To get a stable system you had to limit the RAM. I don't remember if that was just with the NULL series, and it was fixed for mass production devices, or they are all broken. I doubt there are any mv78xx0 machines left, why where never very popular, but there are still Kirkwood NAS boxes around. I keep mine up to date, put an LTS kernel on it once a year, update to the latest debian sid. Andrew