From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D6A74C53200 for ; Sat, 25 Jul 2026 17:22:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=yd2bfieu1qcZhsxx8oAIMmihW8bKAfo662I7j55iy3s=; b=2SvNtu3/teYg4Uu+d+jFvCxMXU zg4D1cKmXLWlN+EK6bTt0F45YEZlc86mTX9uFsTraRMJN/mj8WYBW+tXE6/GdRrOhZFxK3iKtNpaD GzYBajkvHMFakKwQ+FtEJN71+0v8qTbuV66mj2zhXMMdTXfFMbA5Rdwwhdv8tTSMEcg2r2uiZktzF 8tzbdSMDUEO/jyDDsAcQz/Z2PTyT17jLENhXDvDkIC+r0d6pxWgyOJuyf53xjoWOpZGIjJLFOsDmh KlHkqx5zTNS5e4rV11c2knMPDHj0kFIXzTQMUY/uIsW9Cr87hcKjhsGRrj9QmoNiVPhO0YpkRBY6J 6psP/rMA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wng58-00000000aw9-3Z4E; Sat, 25 Jul 2026 17:22:38 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wng57-00000000aul-3iac for kexec@lists.infradead.org; Sat, 25 Jul 2026 17:22:37 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 547FE60A6E; Sat, 25 Jul 2026 17:22:37 +0000 (UTC) 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> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org 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