From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4FDF93F8EB3 for ; Sat, 25 Jul 2026 17:22:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785000158; cv=none; b=REQ4PsGBoa0JOUbsaAXoUOIg2OvCuJPqeqhI/0A/wfqSGblRiIMPb2iNJ7zJ/UmJYUuKDB9U+UzG1Tc64uoF8q+ubWZ8vGJmtlP9wMMcun0674+KepjMVjyYyVmdNSRzE6tfYYMmj2waUvsXz8V83J5rGANMkwOa5qDsuEMhLkI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785000158; c=relaxed/simple; bh=aLP0JdlU+2oUbYpfHefkbCCqFjSuqsF0HQzMlH3eO9o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hRtzTeKPVkhaQ+p1oOcmRpoqTx+SWy2Qz9MS/cK47e10tweH/Y29P8ATY39gImvBHbrb2BX314RpUK9uXJaFb8oJOe5A2d6CVVYjjaBoIQzLLuap3uQpIns98wuM3/WiKXwN9W8eCULCwl2lXybRizUQUf46GCtDLgMua0UI+GE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lrWixHpo; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="lrWixHpo" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D637A1F00A3D; Sat, 25 Jul 2026 17:22:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785000157; bh=yd2bfieu1qcZhsxx8oAIMmihW8bKAfo662I7j55iy3s=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=lrWixHpoWWqPvVE3Pd3ZKkwcMWzSEeQqjYEmmAxcXZuu0rVkQSqIh/sc8q+owTShG LmBxn01+3aGedwidsFQNnmc9d2OHST/6zBcNnOnNmtWFB0hPDauVvOGCsAFDe4ov/D FTd7Wa0oIB1Pw3lg/Jd0y5qSBR2vZwkkmzJTAVTHXqTfvcCVoQ/62F8YadS0krMINQ idr37+7irSZ7l3QR/FXvC4ibk2gZVScfn6t8cYJi9ke7POigz9Uwuw5NEU3Tt1pbKd tscuS5w7lmF2X27Q8DABS97Pc4/yVhVRjlB59sG9sWj87C9FZA4Vevcq1gchKzVOVX viWXi/4fhPv2Q== 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 v4 20/21] memblock: add memblock_reserved_hugetlb_size() Date: Sat, 25 Jul 2026 19:21:20 +0200 Message-ID: <20260725172133.4018491-21-pratyush@kernel.org> X-Mailer: git-send-email 2.55.0.229.g6434b31f56-goog In-Reply-To: <20260725172133.4018491-1-pratyush@kernel.org> References: <20260725172133.4018491-1-pratyush@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 ff470fd0fd10..78112b3f00d0 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -1891,6 +1891,28 @@ 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; -- 2.55.0.229.g6434b31f56-goog