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Mon, 09 Nov 2026 05:48:29 +0000 X-Mizu-Trace-ID: bae7ce2de6921a50 X-Migadu-Flow: FLOW_OUT From: Lance Yang To: songmuchun@bytedance.com Cc: david@kernel.org, maddy@linux.ibm.com, rppt@kernel.org, akpm@linux-foundation.org, lance.yang@linux.dev, mpe@ellerman.id.au, npiggin@gmail.com, chleroy@kernel.org, ritesh.list@gmail.com, sshegde@linux.ibm.com, osalvador@suse.de, qi.zheng@linux.dev, muchun.song@linux.dev, chenhuacai@kernel.org, kernel@xen0n.name, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-riscv@lists.infradead.org, x86@kernel.org, loongarch@lists.linux.dev, linux-s390@vger.kernel.org Subject: Re: [PATCH v3 4/5] mm/sparse-vmemmap: drop vmemmap_can_optimize() Date: Mon, 9 Nov 2026 13:48:23 +0800 Message-ID: <20261109054823.45056-1-lance.yang@linux.dev> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20261107043122.25650-5-songmuchun@bytedance.com> References: <20261107043122.25650-5-songmuchun@bytedance.com> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 26D5F140005 X-Stat-Signature: zhuxoz3mqznfi3i8qj5r41srsubio91y X-Rspam-User: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-HE-Tag: 1794203310-79054 X-HE-Meta: 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 eq4AZRSU B8Zyr0Flk85ie3Jysp0/PvfVtcKoD/a2bpBrmd0eUmYmIpHsDCWKnA3edHwTudI4VJjxASycAToYivXGeW8ydreNprRcoc1LyygAQeK+73R516H8ifAHLsWckwtrA22XU7N1Sr7ChtK/JxdN6HOQ6/eooYoHf73zLNzI2FXlyF4VAR11/WHCAntrUxTjo7buyXAl92R04LvQ9QGbnYCaXjaCm06q3I4DJAuqM3H9lKYuzAfYjTmpbIqwUiDc4bUZV94t6lAkMbTCQqSvlZLZm39pgU+pkfVdD5MZaXn767s/PY/gbZwz4CetGYkMW9y6pgZdoaxGMqSoPn7v2aAa/341/Hc31FQS8gehRg2xW3oGmk9hkgDz3OPExJjj769Xbfcq9 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Sat, Nov 07, 2026 at 12:31:21PM +0800, Muchun Song wrote: >section_vmemmap_optimizable() can already decide whether a section uses >vmemmap optimization based on the section compound order. The DAX-specific >vmemmap_can_optimize() helper duplicates that policy, so remove it to >simplify the code. > >Signed-off-by: Muchun Song >--- With the arch fallbacks handled by the previous patches, we can just drop vmemmap_can_optimize() now ;) Nothing jumped out at me, so: Reviewed-by: Lance Yang