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b=ZnGKWdc4OQi1TdjZMUR3LD+7juKVZGWAyYe7+QViXFa622INTWRgLE2O2tKFoud9V 4/xbf0zjrd94xc1uXIcj2JcfJLYyr510GciQM0aRN2+l62sLj/IoA/ZUmjIz0T5J3B SiZ6ocVCyj6QF0H8wrF/kyCII1RA/CxSw32+JrUEbsbG6154KLapkjVZKkOpeMHI2m hYglF1n7c3oAjwTRpnzhB8cVs00W6orwNGzoaOj3bL272GRmBLVwmtPWC3RCxSdpBk z8yJipGkv0JrgzvsfE5pyda5kuDXq9ic8Jnb9ydHxK5wmMxwpS7cSZcbQNOvFsGGt6 4XUgQkdy6dzSQ== 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 07/13] kho: Remove global preserved_mem_map and store state in FDT In-Reply-To: <20251114155358.2884014-8-pasha.tatashin@soleen.com> (Pasha Tatashin's message of "Fri, 14 Nov 2025 10:53:52 -0500") References: <20251114155358.2884014-1-pasha.tatashin@soleen.com> <20251114155358.2884014-8-pasha.tatashin@soleen.com> Date: Fri, 14 Nov 2025 18:11:39 +0100 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Rspamd-Server: rspam12 X-Rspam-User: X-Rspamd-Queue-Id: 68926C000B X-Stat-Signature: 9q47fjmj4c5exz7zsbrrmm5wsuw5rhp8 X-HE-Tag: 1763140303-674706 X-HE-Meta: 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 ZJVDVB9D 8o8B9efevwY+lewmQ2kFms/Vq1YqUceYTMRi8mx69OEDO67qIdycV3Ast41nf1/ouLYfCz6CsFH5grI8Jt8m6NvB6MgeWo8AELKS4cObFpOfMGdZFUNHpiXqT+f0s+y60+VW0hbBw9QakfpvCuZ5egmfdPMHf9rkDy050zC2lmWg8kUFwsKOFZUTZrmuSXCg/oEKjxmELc1amTxvbgLx2XyUBFvfGmnMf7EueXAVRP8Z3ze38g5GBpwwTC3kfbHqvD986kcMrLnt2gYr+wYeppy5MRIJVBnxqAQ1lm2EdOcQFx9g= 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, the serialized memory map is tracked via > kho_out.preserved_mem_map and copied to the FDT during finalization. > This double tracking is redundant. > > Remove preserved_mem_map from kho_out. Instead, maintain the physical > address of the head chunk directly in the preserved-memory-map FDT > property. > > Introduce kho_update_memory_map() to manage this property. This function > handles: > 1. Retrieving and freeing any existing serialized map (handling the > abort/retry case). > 2. Updating the FDT property with the new chunk address. > > This establishes the FDT as the single source of truth for the handover > state. > > Signed-off-by: Pasha Tatashin Reviewed-by: Pratyush Yadav [...] -- Regards, Pratyush Yadav