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[66.187.233.73]) by mx.google.com with ESMTPS id k187-v6si2073108qkf.39.2018.05.21.03.16.08 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 21 May 2018 03:16:08 -0700 (PDT) Received-SPF: pass (google.com: domain of bhe@redhat.com designates 66.187.233.73 as permitted sender) client-ip=66.187.233.73; Authentication-Results: mx.google.com; spf=pass (google.com: domain of bhe@redhat.com designates 66.187.233.73 as permitted sender) smtp.mailfrom=bhe@redhat.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E4ED64201AF5; Mon, 21 May 2018 10:16:07 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (ovpn-8-17.pek2.redhat.com [10.72.8.17]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3C96A2024CBD; Mon, 21 May 2018 10:16:02 +0000 (UTC) From: Baoquan He To: linux-kernel@vger.kernel.org, akpm@linux-foundation.org, dave.hansen@intel.com, pagupta@redhat.com Cc: linux-mm@kvack.org, kirill.shutemov@linux.intel.com, Baoquan He Subject: [PATCH v4 1/4] mm/sparse: Add a static variable nr_present_sections Date: Mon, 21 May 2018 18:15:52 +0800 Message-Id: <20180521101555.25610-2-bhe@redhat.com> In-Reply-To: <20180521101555.25610-1-bhe@redhat.com> References: <20180521101555.25610-1-bhe@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Mon, 21 May 2018 10:16:08 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Mon, 21 May 2018 10:16:08 +0000 (UTC) for IP:'10.11.54.4' DOMAIN:'int-mx04.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'bhe@redhat.com' RCPT:'' X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: X-Virus-Scanned: ClamAV using ClamSMTP 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 Acked-By: Dave Hansen --- mm/sparse.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/mm/sparse.c b/mm/sparse.c index 62eef264a7bd..48cf7b7982e2 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -202,6 +202,12 @@ 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) { @@ -231,6 +237,7 @@ 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++; } } }