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 CAD253B05A6 for ; Wed, 29 Jul 2026 14:57:16 +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=1785337037; cv=none; b=uZbolTVYIYmL7hDndx289XilfyH0YVxLWFB65ACQLqBaXx0uVYSR6f7KWnCSZjXvjAa/Vuq1t+vdYyxcOdMjYqV9+pUZj3KhLR39AjMW7NWd1/G7tZeIiE3s8njPcnzLoVkgCmCwul/afg4bVrEjT5bgbvkk1bYirZUq1VejFYg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785337037; c=relaxed/simple; bh=5j5yUyQelSpQHldJNgFIotMVQEoZmRzEZ/sJLdEYoKs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=H6fS6mNePqPg5QAj5Z3mdX2uiFInEfYmX1g05/NN4GeNxOpYa+qrDqufYVEkWzXA1DSQ1IxtW4wYy39sqvhVINIL9KOoe8Rlba+wVNsvqAYU7Cr4+Bgw1fFRFOKQzOaEj+dI5CCCWlO8/eBMw6uyyUPippdBorDKM05bVhLR6hw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EIlg5X7D; 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="EIlg5X7D" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 861861F00A3A; Wed, 29 Jul 2026 14:57:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785337036; bh=Lzc973wrpBvl2rlA3xdelaF9rXhGdCJv6jnQryQfQag=; h=From:To:Cc:Subject:Date:In-Reply-To:References; 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> 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 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