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b=bzWr+9fMDT40ul//Wh0slIyzzEidBdejxO5cR7NbPRtOVVvAqGyj34Wcjl0GVsVL/ e5AAu7R5FuHpcwcl0vT5OxO4mOGW6ILzHpmz1KtFmnmjro7qyVe+AFD+y2/hzuRoeR /Hu3VoM24gw7pmHajQ3lZpvlkeatiCzIECuyvAIw4f7aG4fZf+RCCf3dQv4wsPaSDA Qjh2zuOfvgXZucv5/6fXHsA2A8fVnoSZGc3IFtIq6SHTpqIt6xJv+tlsXY0H6I+VmU IkJQNnthGSgjr3scbIY1IHtNXps73QQ06RmRq9jsU1okpl4j6xT0vNrXsqKoMLoN1R MgEOeKb/B0UXA== 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 v6 21/22] memblock: add memblock_reserved_hugetlb_size() Date: Sat, 1 Aug 2026 10:48:30 +0200 Message-ID: <20260801084833.1897543-22-pratyush@kernel.org> X-Mailer: git-send-email 2.55.0.571.g244d577d93-goog In-Reply-To: <20260801084833.1897543-1-pratyush@kernel.org> References: <20260801084833.1897543-1-pratyush@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 0900840004 X-Rspam-User: X-Stat-Signature: u6z1tc4jeox45it4wtg8resyz3gkgtbr X-HE-Tag: 1785574187-401621 X-HE-Meta: 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 pQOKPyyt 7AQZZXy1/I/w5t3Jk33+zZwoRmD+6yo8tQrkiiFmH9Q/RdQobN6G8X7R40yyijzjG+ZYNpb2sZUhkdV9FEWu4JXHMD4B36do7CatqsWXuJR5kCX28GcpbIADQczGjcT9MeF7FIiRZwLdly/ZmSF9QrBjaqxFYd1aE6GWcnNDskBB2uMHjBDDkj1cVRDy2jn+DbpCVhOFt/AhJ9Ks/yRUtVbqSTgmu6bnKjw2dcE/uI/3qYgYjSESH6fFk5KRJgNQUxhz+KtzjUfk4t1qjqw3A890QzvfZOG1e4VQr 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; -- 2.55.0.571.g244d577d93-goog