From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-f199.google.com (mail-qt0-f199.google.com [209.85.216.199]) by kanga.kvack.org (Postfix) with ESMTP id 8D26E6B0010 for ; Thu, 28 Jun 2018 02:29:11 -0400 (EDT) Received: by mail-qt0-f199.google.com with SMTP id v14-v6so4490597qto.5 for ; Wed, 27 Jun 2018 23:29:11 -0700 (PDT) Received: from mx1.redhat.com (mx3-rdu2.redhat.com. [66.187.233.73]) by mx.google.com with ESMTPS id n32-v6si193457qta.356.2018.06.27.23.29.10 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 27 Jun 2018 23:29:10 -0700 (PDT) From: Baoquan He Subject: [PATCH v6 1/5] mm/sparse: Add a static variable nr_present_sections Date: Thu, 28 Jun 2018 14:28:53 +0800 Message-Id: <20180628062857.29658-2-bhe@redhat.com> In-Reply-To: <20180628062857.29658-1-bhe@redhat.com> References: <20180628062857.29658-1-bhe@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org, akpm@linux-foundation.org, dave.hansen@intel.com, pagupta@redhat.com, Pavel Tatashin , Oscar Salvador Cc: linux-mm@kvack.org, kirill.shutemov@linux.intel.com, Baoquan He It's used to record how many memory sections are marked as present during system boot up, and will be used in the later patch. Signed-off-by: Baoquan He Reviewed-by: Pavel Tatashin --- mm/sparse.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/mm/sparse.c b/mm/sparse.c index f13f2723950a..6314303130b0 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -200,6 +200,12 @@ static inline int next_present_section_nr(int section_nr) (section_nr <= __highest_present_section_nr)); \ section_nr = next_present_section_nr(section_nr)) +/* + * Record how many memory sections are marked as present + * during system bootup. + */ +static int __initdata nr_present_sections; + /* Record a memory area against a node. */ void __init memory_present(int nid, unsigned long start, unsigned long end) { @@ -229,6 +235,7 @@ void __init memory_present(int nid, unsigned long start, unsigned long end) ms->section_mem_map = sparse_encode_early_nid(nid) | SECTION_IS_ONLINE; section_mark_present(ms); + nr_present_sections++; } } } -- 2.13.6