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b=EIlg5X7DHxSwfw45OQMrO1e+tdKJl3H5HoRQn7bw1lvRhCT/1qTvoruee3GbsKFaZ Dx4FKZJoNEifrcSBreQ7rWPhXIu2KBIOnUV8alkolgAkvh2tkjkAEDDLTAMeZgnmT/ zEdtk3uEyZaptDOZtHpYw/2Y9Zt23OKLRso60zx3Ph5PXXjUAG2ZYfTTtBvJjbAsAD rBNT2dkLTAhh0hNa9Goqw2acttyw/0YzyLZ5PKZcp+5W7Ng2PHGiIxDJ/9el0hnBC/ AJblsf0WWsO4h0vNlU0KRdjI5gaFWMg9xm7JUj7+Fao6Nitnoju2BtH01qvXP0oQ0u vuDP+8MOxQIaQ== 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 v5 21/22] memblock: add memblock_reserved_hugetlb_size() Date: Wed, 29 Jul 2026 16:56:06 +0200 Message-ID: <20260729145610.2827231-22-pratyush@kernel.org> X-Mailer: git-send-email 2.55.0.508.g3f0d502094-goog In-Reply-To: <20260729145610.2827231-1-pratyush@kernel.org> References: <20260729145610.2827231-1-pratyush@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: pgubxr4caaiuntcab3rerwdh3d68kiop X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 63BD04000C X-HE-Tag: 1785337037-265840 X-HE-Meta: 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 QLlrlzFw S797C4/O96D/aZl7NhPL7Mf4OBFkgYSJ7lOe9K8HMg2OdYwiDA38WpyJPi5zvaGaojtpLTcI2ns8zPHfT083wChqbSZLAcRmzNMub8I8ZmyulO56FS+2Yf4e5YsFL4zVhB8xrLhkdTGjFAJTg44+UEt93+Sd4bOrBC+SC8cep8LaDiwsptpYDtFSeLlxQcNWPIMlRf7FNZKagk10CgH24A38DqWoedwT3nPhSGR4/XOvqgR8uIvX7SaGpydyj3WACv7RHZ5zmfH8elJ3K9cKK/bDv9Q== 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 77c6540e7528..37e06e70c1d0 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -1899,6 +1899,28 @@ 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; -- 2.55.0.508.g3f0d502094-goog