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 A6ABBEEB575 for ; Thu, 1 Jan 2026 01:27:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Mime-Version:References:In-Reply-To: Message-Id:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Y0scR4pc8pvAvcD7neNBVOK1KJ5oCKtT8vx1rX17vKI=; b=RKf/JVmuPYQOsl mxVoWQQYs1ZAxN8aux0WqbqDmF/iUnec6FSq6lcNhi9C2LGPEZpJWHGO8ZAIEnMzhdoLfxk2hQuTG CTwlg2lYmNa7Rm5CnERpm7FgBXmIKuWF9hqRZ4xtdjFsOXrPhj984EWenRuLpiDG4HtmGUyflp/CB T6jVM1wbsAbR82bYIzUd3Cxd8jhSP3Q9O7O5uqXnAcPF5rx0KDYtfxEesdJwbTTXihqAHK71dKNUe pHQY2WtNOvPMZRckp3qlwSI/j8SyypCMnnrd1c7AkA2x3i4HJ6iNt+2/51A/Iyu8wXvL8IhKZE6QE xA8GEYyLtlfH7tZPycUQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vb7TG-00000006Upa-1Ix4; Thu, 01 Jan 2026 01:27:22 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vb7TD-00000006UpL-3Plf; Thu, 01 Jan 2026 01:27:20 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 3163160008; Thu, 1 Jan 2026 01:27:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CF7ACC113D0; Thu, 1 Jan 2026 01:27:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1767230836; bh=kfzq7OmA115iWgJ760zWgcONuzBXEf0EdKCppmYMA+4=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=go9XllSISBYzAOyojV4kRDLc0Hnz1rcUEPO57TcB9+qJSNx41b/AgCw3COmwnxqiT j7mZyPb6MMMoWfBvYMRKbnSkqA9aNlPjK8qN3O6fQrDlWlCfoS7A/tERDwbL0qwoSr LfQqAcLLX+Rrl87zP58OiVxJMBgmW31R6wiBayKc= Date: Wed, 31 Dec 2025 17:27:14 -0800 From: Andrew Morton To: Mike Rapoport Cc: Alex Shi , Alexander Gordeev , Andreas Larsson , Borislav Petkov , Brian Cain , "Christophe Leroy (CS GROUP)" , Catalin Marinas , "David S. Miller" , Dave Hansen , David Hildenbrand , Dinh Nguyen , Geert Uytterhoeven , Guo Ren , Heiko Carstens , Helge Deller , Huacai Chen , Ingo Molnar , Johannes Berg , John Paul Adrian Glaubitz , Jonathan Corbet , "Liam R. Howlett" , Lorenzo Stoakes , Magnus Lindholm , Matt Turner , Max Filippov , Michael Ellerman , Michal Hocko , Michal Simek , Muchun Song , Oscar Salvador , Palmer Dabbelt , Pratyush Yadav , Richard Weinberger , Russell King , Stafford Horne , Suren Baghdasaryan , Thomas Bogendoerfer , Thomas Gleixner , Vasily Gorbik , Vineet Gupta , Vlastimil Babka , Will Deacon , x86@kernel.org, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-cxl@vger.kernel.org, linux-doc@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-um@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, sparclinux@vger.kernel.org Subject: Re: [PATCH 00/28] arch, mm: consolidate hugetlb early reservation Message-Id: <20251231172714.a7fe44e856c14fdc8fe1cb43@linux-foundation.org> In-Reply-To: <20251228124001.3624742-1-rppt@kernel.org> References: <20251228124001.3624742-1-rppt@kernel.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Sun, 28 Dec 2025 14:39:30 +0200 Mike Rapoport wrote: > Order in which early memory reservation for hugetlb happens depends on > architecture, on configuration options and on command line parameters. > > Some architectures rely on the core MM to call hugetlb_bootmem_alloc() > while others call it very early to allow pre-allocation of HVO-style > vmemmap. > > When hugetlb_cma is supported by an architecture it is initialized during > setup_arch() and then later hugetlb_init code needs to understand did it > happen or not. > > To make everything consistent and unified, both reservation of hugetlb > memory from bootmem and creation of CMA areas for hugetlb must be called > from core MM initialization and it would have been a simple change. > However, HVO-style pre-initialization ordering requirements slightly > complicate things and for HVO pre-init to work sparse and memory map should > be initialized after hugetlb reservations. > > This required pulling out the call to free_area_init() out of setup_arch() > path and moving it MM initialization and this is what the first 23 patches > do. > > These changes are deliberately split into per-arch patches that change how > the zone limits are calculated for each architecture and the patches 22 and > 23 just remove the calls to free_area_init() and sprase_init() from arch/*. > > Patch 24 is a simple cleanup for MIPS. > > Patches 25 and 26 actually consolidate hugetlb reservations and patches 27 > and 28 perform some aftermath cleanups. Thanks for the diligence - this can't have been the most exciting thing to work on! > I tried to trim the distribution list and although it's still quite long > if you feel that someone was wrongly excluded please add them back. I'll add these to mm.git's mm-new branch for some testing. I'll suppress the usual email storm because 41 * 28 is a lot of emails ;) _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv