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bh=GIKLTijiKnBgrZXcLoBE8VlZLtn/daTEtdVuzKJ4kpE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=a+g1M1oDufFBFZydVBdmxrJjcJaTrBCkRDeT/XIBd08gpl1wEoGlOx3f13NjoUa+p wz1WAATyzMrRkjhi+H64P2b6Bzm83+JmjSoyqq1LWfsOI76/LkKfRC7DG69mlPIv8C tkjd7rX6MvY6qfRw2mP3UoERGmt27c201PhOHzc/tgA5jlTaH6HQQproNWA9K3dT23 sWMjZ34E+MFNA4NmEVtItaSSytuQQNYhNbh63AB7+CWuLCogtgGuI+eO25fU1/s9bl dsjc4ZcnKzfO3y3E5gHiFsAhhspI8y9QvbfVeO6I1/SL/7jnP1yjS/dQnLYUszCTZy EpVxJLH7hSQpQ== From: Pratyush Yadav To: Mike Rapoport , Pasha Tatashin , Pratyush Yadav , Alexander Graf , Muchun Song , Oscar Salvador , David Hildenbrand , Andrew Morton , Jason Miu , Jork Loeser Cc: kexec@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 20/21] memblock: add memblock_reserved_hugetlb_size() Date: Thu, 9 Jul 2026 19:38:09 +0200 Message-ID: <20260709173821.429921-21-pratyush@kernel.org> X-Mailer: git-send-email 2.55.0.141.g00534a21ce-goog In-Reply-To: <20260709173821.429921-1-pratyush@kernel.org> References: <20260709173821.429921-1-pratyush@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 0279840008 X-Stat-Signature: wfm1pcusr9864e8pinuk6fbgruo7e1fk X-HE-Tag: 1783618763-394831 X-HE-Meta: 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 7IW0w6C7 Tyrd8ADFeSsEiyuHAQjThLAgXxY4Nl0qgQxgaykVGnXwgeTSSkUcbNMv7c4Ajuon2Q0pzAM1qaipP8cL7EbLYgCqeUxg18+PJUPVkjiCm4FEdrTamMmcTR7Ff2PrCeXPPc54o8YF2o8xGFqsL3v3rYKizsRkMBALzLj9wJVQ6DrqPd+pMzHfDiMqkzI8h/VS0ykkBpGLbRc++Pfi/IN5eXfQLPycZk9TwKdHsBqpqmjvL+lxbH/zqPH37bW2epGilmKmUmt02Z9/cgMR+Dy2TVehAyA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: "Pratyush Yadav (Google)" Similar to memblock_reserved_kern_size(), but calculates only the memory reserved for hugetlb pages. This is needed in an upcoming commit that subtracts hugetlb reservation size when computing the size of KHO scratch areas. Signed-off-by: Pratyush Yadav (Google) --- include/linux/memblock.h | 1 + mm/memblock.c | 22 ++++++++++++++++++++++ 2 files changed, 23 insertions(+) diff --git a/include/linux/memblock.h b/include/linux/memblock.h index 678fe466529a..d62db9e776cf 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -487,6 +487,7 @@ static inline __init_memblock bool memblock_bottom_up(void) phys_addr_t memblock_phys_mem_size(void); phys_addr_t memblock_reserved_size(void); phys_addr_t memblock_reserved_kern_size(phys_addr_t limit, int nid); +phys_addr_t memblock_reserved_hugetlb_size(phys_addr_t limit, int nid); unsigned long memblock_estimated_nr_free_pages(void); phys_addr_t memblock_start_of_DRAM(void); phys_addr_t memblock_end_of_DRAM(void); diff --git a/mm/memblock.c b/mm/memblock.c index ba6d887ea18e..c10dfb054806 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -1893,6 +1893,28 @@ phys_addr_t __init_memblock memblock_reserved_size(void) return memblock.reserved.total_size; } +phys_addr_t __init_memblock memblock_reserved_hugetlb_size(phys_addr_t limit, int nid) +{ + struct memblock_region *r; + phys_addr_t total = 0; + + for_each_reserved_mem_region(r) { + phys_addr_t size = r->size; + + if (r->base > limit) + break; + + if (r->base + r->size > limit) + size = limit - r->base; + + if (nid == memblock_get_region_node(r) || !numa_valid_node(nid)) + if (r->flags & MEMBLOCK_RSRV_HUGETLB) + total += size; + } + + return total; +} + phys_addr_t __init_memblock memblock_reserved_kern_size(phys_addr_t limit, int nid) { struct memblock_region *r; -- 2.55.0.141.g00534a21ce-goog