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[66.90.148.213]) by smtp.gmail.com with ESMTPSA id bi20sm3422829oib.29.2021.11.29.16.08.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Nov 2021 16:08:13 -0800 (PST) Received: (nullmailer pid 864351 invoked by uid 1000); Tue, 30 Nov 2021 00:08:10 -0000 Date: Mon, 29 Nov 2021 18:08:10 -0600 From: Rob Herring To: Mike Rapoport Cc: Calvin Zhang , Vineet Gupta , Russell King , Catalin Marinas , Will Deacon , Guo Ren , Yoshinori Sato , Thomas Bogendoerfer , Nick Hu , Greentime Hu , Vincent Chen , Dinh Nguyen , Jonas Bonn , Stefan Kristiansson , Stafford Horne , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Paul Walmsley , Palmer Dabbelt , Albert Ou , Rich Felker , Chris Zankel , Max Filippov , Frank Rowand , Andrew Morton , David Hildenbrand , Arnd Bergmann , Kefeng Wang , Vladimir Isaev , "Russell King (Oracle)" , "Kirill A. Shutemov" , Guenter Roeck , Marc Zyngier , David Brazdil , Anshuman Khandual , Andrey Konovalov , Mark Rutland , Souptick Joarder , Jinyang He , "Rafael J. Wysocki" , Serge Semin , Tiezhu Yang , Geert Uytterhoeven , Randy Dunlap , Ley Foon Tan , Andreas Oetken , Christophe JAILLET , Christophe Leroy , Zhang Yunkai , Andy Shevchenko , Markus Elfring , Ganesh Goudar , "Aneesh Kumar K.V" , Atish Patra , Anup Patel , Nick Kossifidis , Alexandre Ghiti , Vitaly Wool , Thierry Reding , Lee Jones , Guo Ren , Alexander Sverdlin , Greg Kroah-Hartman , Mauri Sandberg , Palmer Dabbelt , linux-snps-arc@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, uclinux-h8-devel@lists.sourceforge.jp, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org, linux-xtensa@linux-xtensa.org, devicetree@vger.kernel.org Subject: Re: [PATCH 0/2] of: remove reserved regions count restriction Message-ID: References: <20211119075844.2902592-1-calvinzhang.cool@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211129_160815_654594_C2A4A3B0 X-CRM114-Status: GOOD ( 24.52 ) X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org On Sun, Nov 21, 2021 at 08:43:47AM +0200, Mike Rapoport wrote: > On Fri, Nov 19, 2021 at 03:58:17PM +0800, Calvin Zhang wrote: > > The count of reserved regions in /reserved-memory was limited because > > the struct reserved_mem array was defined statically. This series sorts > > out reserved memory code and allocates that array from early allocator. > > > > Note: reserved region with fixed location must be reserved before any > > memory allocation. While struct reserved_mem array should be allocated > > after allocator is activated. We make early_init_fdt_scan_reserved_mem() > > do reservation only and add another call to initialize reserved memory. > > So arch code have to change for it. > > I think much simpler would be to use the same constant for sizing > memblock.reserved and reserved_mem arrays. Do those arrays get shrunk? Or do we waste the memory forever? Maybe we can copy and shrink the initial array? Though I suspect struct reserved_mem pointers have already been given out. > > If there is too much reserved regions in the device tree, reserving them in > memblock will fail anyway because memblock also starts with static array > for memblock.reserved, so doing one pass with memblock_reserve() and > another to set up reserved_mem wouldn't help anyway. > > > I'm only familiar with arm and arm64 architectures. Approvals from arch > > maintainers are required. Thank you all. > > > > Calvin Zhang (2): > > of: Sort reserved_mem related code > > of: reserved_mem: Remove reserved regions count restriction > > > > arch/arc/mm/init.c | 3 + > > arch/arm/kernel/setup.c | 2 + > > arch/arm64/kernel/setup.c | 3 + > > arch/csky/kernel/setup.c | 3 + > > arch/h8300/kernel/setup.c | 2 + > > arch/mips/kernel/setup.c | 3 + > > arch/nds32/kernel/setup.c | 3 + > > arch/nios2/kernel/setup.c | 2 + > > arch/openrisc/kernel/setup.c | 3 + > > arch/powerpc/kernel/setup-common.c | 3 + > > arch/riscv/kernel/setup.c | 2 + > > arch/sh/kernel/setup.c | 3 + > > arch/xtensa/kernel/setup.c | 2 + > > drivers/of/fdt.c | 107 +--------------- > > drivers/of/of_private.h | 12 +- > > drivers/of/of_reserved_mem.c | 189 ++++++++++++++++++++++++----- > > include/linux/of_reserved_mem.h | 4 + > > 17 files changed, 207 insertions(+), 139 deletions(-) > > > > -- > > 2.30.2 > > > > -- > Sincerely yours, > Mike. > _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc