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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BFBBAC2D0ED for ; Thu, 26 Mar 2020 22:24:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 903F5216FD for ; Thu, 26 Mar 2020 22:24:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="PNtVMhtU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727347AbgCZWYv (ORCPT ); Thu, 26 Mar 2020 18:24:51 -0400 Received: from mail-wm1-f68.google.com ([209.85.128.68]:54925 "EHLO mail-wm1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726260AbgCZWYu (ORCPT ); Thu, 26 Mar 2020 18:24:50 -0400 Received: by mail-wm1-f68.google.com with SMTP id c81so9176153wmd.4 for ; Thu, 26 Mar 2020 15:24:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=ypZyzlrBAG+cLsLy+PU3T0dnOH3TPzYnikBxeCUs2mM=; b=PNtVMhtUOqP8DzyueMCTTgYYrWGu+yFrrmFpnA19hy4ZMZ/s62bZxKhvArlVVOSFQS hrCxqLZJs8FIZZHi6/FbeFe+4566AOXU+65eUYtYGJGRrSP1fRzcxHoR2PuIW8ZWk15+ 3nELe9YQ8rGDue7kr13V4iMg+Ui/yGYCbsCA1yyNj+Fgg0CcobDMvk8HBSA1ojYn1qk9 nXU7EpZVZ/Dtuj9KfD719HX6/KCYayR1l7W5TND7xGjPrECXkIWQ22orEKqqaoU9EkM+ j4dKvLVmaJMqt+dlcdlKdoyBRbRRBzlXVcHIfVX8sK8EkZ/hkwE0zCM+AZkwO+XQo4P9 zD8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=ypZyzlrBAG+cLsLy+PU3T0dnOH3TPzYnikBxeCUs2mM=; b=XxVeuKsS5DYNtWoz2wtD4YpTTW9+YYwi0Ykhfy0oTBWXG9Xau8/uVatuS9uvrP0CS1 3pMcQ3mGm9WbWPW3KNkHGbf37YrDE9HFgTYJi7MeC9wfp93M0eyaRuYQQiegAy2ShRD4 jXSR0h57uOq9mwb6Oq3xiE4GHU84JIkn4F005PYHJ/dUY1zg6CjIjrknVcXuYRYu8ABg pP4UY9JKyejtpk93D0ZT4f5QLHZ4agu/NNnq5WA9VhOSjoIiqzMsbMRmgfrE2ekzKz4e ja/gXOTZOF5LyzN56DaiRtpaJxP75HDrCYO8nNndKnv4+UIQGi+35wvxFRa8DSw50M0g 47WQ== X-Gm-Message-State: ANhLgQ1NZsTIbR3OdbMkKuOA3oP60m7fxdiqd3vroGtiK6QB1AvVOQ4n GDKN1bjhcKwZ7j0KJaShz/Yuzp8Q X-Google-Smtp-Source: ADFU+vsHPQH1+HrBFDUdDLpJjUvvAhy2zrl3d4FreyJZGAjpLSFjTA1BKwyta+vrf+MCVIx4unC3qg== X-Received: by 2002:adf:ef51:: with SMTP id c17mr9582651wrp.130.1585261489629; Thu, 26 Mar 2020 15:24:49 -0700 (PDT) Received: from localhost ([185.92.221.13]) by smtp.gmail.com with ESMTPSA id a64sm5312899wmh.39.2020.03.26.15.24.49 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 26 Mar 2020 15:24:49 -0700 (PDT) From: Wei Yang To: akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Wei Yang Subject: [PATCH 2/2] mm/page_alloc.c: define node_order with all zero Date: Thu, 26 Mar 2020 22:24:45 +0000 Message-Id: <20200326222445.18781-2-richard.weiyang@gmail.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20200326222445.18781-1-richard.weiyang@gmail.com> References: <20200326222445.18781-1-richard.weiyang@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Since we always clear node_order before getting it, we can leverage compiler to do this instead of at run time. Signed-off-by: Wei Yang --- mm/page_alloc.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 2144b6ceb119..7a6435cffdb7 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5585,7 +5585,7 @@ static void build_thisnode_zonelists(pg_data_t *pgdat) static void build_zonelists(pg_data_t *pgdat) { - static int node_order[MAX_NUMNODES]; + static int node_order[MAX_NUMNODES] = {0}; int node, load, nr_nodes = 0; nodemask_t used_mask = {.bits = {0}}; int local_node, prev_node; @@ -5595,7 +5595,6 @@ static void build_zonelists(pg_data_t *pgdat) load = nr_online_nodes; prev_node = local_node; - memset(node_order, 0, sizeof(node_order)); while ((node = find_next_best_node(local_node, &used_mask)) >= 0) { /* * We don't want to pressure a particular node. -- 2.23.0