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Thu, 22 Oct 2026 01:38:29 -0700 (PDT) Received: from [192.168.1.18] ([83.231.69.9]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48e25828e72sm10155819f8f.26.2026.10.22.01.38.28 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 22 Oct 2026 01:38:29 -0700 (PDT) Message-ID: <2f3e24cf-a09a-4355-a342-5eba8573d78c@gmail.com> Date: Thu, 22 Oct 2026 10:38:28 +0200 X-Archived-By: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 3/5] mm: hugetlb: track CMA reservations by pool To: Qi Zheng , muchun.song@linux.dev, david@kernel.org, osalvador@suse.de, akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Qi Zheng References: <29b35f7221c30f1dfa320a933f6095f37b612a37.1792651104.git.zhengqi.arch@bytedance.com> Content-Language: en-US From: "Jose A. Perez de Azpillaga" In-Reply-To: <29b35f7221c30f1dfa320a933f6095f37b612a37.1792651104.git.zhengqi.arch@bytedance.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Queue-Id: 19520180003 X-Stat-Signature: i53khqjittg9kj38f8171qzryb8reagr X-Rspamd-Server: rspam01 X-Spam-Status: No, score=-9.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_PASS,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=4.0.1 X-HE-Tag: 1792658310-652273 X-HE-Meta: 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 2W9AotS+ +ks/Gx8TfDBrqV4pgvRUnaFQFN8VnrSLdx6bDSP4O1gZncJTTeC3Ie7yzexnn5ZnoKJzGDUzhZZqbeDSuQwipJu3cij3okf5b2i7F2zvil0+S89Ik+KrWbva1DZiDcTloYmckzHJb4uLuKjmHkrrFxkamCkO3JsnogttTVQVlf12cyVCV86SmCGQ/W4V8sivT0rzFB+F52ryfjWsRR7JCEJ6mEVOqKv24cMcLLJvY6QblEO3QEBJS+41fEapxiWN2e1+evw+Mo9xaZS9vJGY/jspu/2M5LeqpxnT8tIemfEiNnyr4uKNM/Kavac0aZcmy7sCLzykeza54epvC8v9W66sgmNfZJnvuyo2SvNjxhrFtjKY8JfqszYWGUlI+MIEgnQBjNK5E72TsHGdY5W/MTjhB+j3uDMvkxwopCVPB94P5LMYTIOxHNmoDCbX9XCV8tA9tTlIzJAdT5DYgbAyStbq6OYaxLv4GOUIo 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 10/22/26 9:31 AM, Qi Zheng wrote: > From: Qi Zheng > > Introduce fixed default and PMD pool slots in preparation for PMD-sized > HugeTLB CMA support. Continue accepting only the architecture's existing > CMA page size and keep all gigantic sizes sharing the default pool. > PMD-sized pool support will be added in a subsequent patch. > > Select the pool for allocation, CMA-only checks and boot-time accounting. > Release folios through the CMA area that owns their physical memory, > including after demotion. > > Record each pool's successfully reserved capacity and remove > hugetlb_cma_validate_params(), since the per-pool CMA-only check handles > missing or empty reservations. > > Assisted-by: LLM > Signed-off-by: Qi Zheng LGTM so: Reviewed-by: Jose A. Perez de Azpillaga -- cheers, jose a. p-a