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b=dn0ywYFX7u1pMRmBB6mt3qOI+RoqX+gUyW3hryzuEn23rmHGfuVLx34qn3gdb7I7H sN+fIgiXgJzEL+gSz1mj0HFq7lITtHxpI+gru7gqIffawp8FYnhfrNEFVhx0Lin4wB eSbKoeJGcCs3KiiT0WR18L/2xpurvlBBH4UL6IYLGIpdUXqSFN+zw75W6qftHLAM58 O7XfUeBAQ5Twwq1DGqjDqssc8MacW9QvEKVbhiEvGXv2Mg8tAAG8XFsl0RJzOuDNMm sNEbe+OBiF4o72N5YbKBfYVEXjLYJK+UCR3yqYg4wmcVJCChemVNnocLYFm0BKFqha GbFfyXYii0QeA== From: Pratyush Yadav To: Pasha Tatashin Cc: akpm@linux-foundation.org, bhe@redhat.com, rppt@kernel.org, jasonmiu@google.com, arnd@arndb.de, coxu@redhat.com, dave@vasilevsky.ca, ebiggers@google.com, graf@amazon.com, kees@kernel.org, linux-kernel@vger.kernel.org, kexec@lists.infradead.org, linux-mm@kvack.org Subject: Re: [PATCH v1 09/13] kho: Update FDT dynamically for subtree addition/removal In-Reply-To: <20251114155358.2884014-10-pasha.tatashin@soleen.com> (Pasha Tatashin's message of "Fri, 14 Nov 2025 10:53:54 -0500") References: <20251114155358.2884014-1-pasha.tatashin@soleen.com> <20251114155358.2884014-10-pasha.tatashin@soleen.com> Date: Fri, 14 Nov 2025 18:27:57 +0100 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Stat-Signature: cdibcxaegeousegdex3at4apg94znmg4 X-Rspam-User: X-Rspamd-Queue-Id: 5FC31C000C X-Rspamd-Server: rspam10 X-HE-Tag: 1763141281-334708 X-HE-Meta: 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 0G2if4d9 YnEvgi//UGHrkyC4RjKiuAWAIO9u7zjarrW5NnFkeqyE9ED4/9Z/KmJrLn/MiG5p2ds9C3iCIi4RH8/QZiqV6G0CBTo5Kw1Fycdw/r+DddILTSsJD2ynaLaovVX/Huu3UyG+AQdfHMbg+6EX+N45E4HjQzDbz2VizEc6aHIa/e+HjAzV+CLbuusiwZPoFNmwUnSpU5GfRvuuyWztYwWgaVO6WxZROnSCi188MK7CEH50EbJdBYfEJu2nuypMlSlaT+67j 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: List-Subscribe: List-Unsubscribe: On Fri, Nov 14 2025, Pasha Tatashin wrote: > Currently, sub-FDTs were tracked in a list (kho_out.sub_fdts) and the > final FDT is constructed entirely from scratch during kho_finalize(). > > We can maintain the FDT dynamically: > 1. Initialize a valid, empty FDT in kho_init(). > 2. Use fdt_add_subnode and fdt_setprop in kho_add_subtree to > update the FDT immediately when a subsystem registers. > 3. Use fdt_del_node in kho_remove_subtree to remove entries. > > This removes the need for the intermediate sub_fdts list and the > reconstruction logic in kho_finalize(). kho_finalize() now > only needs to trigger memory map serialization. > > Signed-off-by: Pasha Tatashin Reviewed-by: Pratyush Yadav [...] -- Regards, Pratyush Yadav