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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 13946C00140 for ; Wed, 3 Aug 2022 02:51:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234911AbiHCCvd (ORCPT ); Tue, 2 Aug 2022 22:51:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33864 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231522AbiHCCvb (ORCPT ); Tue, 2 Aug 2022 22:51:31 -0400 Received: from mail-pj1-x1034.google.com (mail-pj1-x1034.google.com [IPv6:2607:f8b0:4864:20::1034]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4FF6613DEB for ; Tue, 2 Aug 2022 19:51:30 -0700 (PDT) Received: by mail-pj1-x1034.google.com with SMTP id o5-20020a17090a3d4500b001ef76490983so691792pjf.2 for ; Tue, 02 Aug 2022 19:51:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=SubjzKtYxDwDh8eAZSjb5LF7LaekSyXiSzaHJbGx46c=; b=0k+LPPDqot9w/ei6bhu8Saf19+jwJhCTiXVlPLOiH/apZc7EFs3Jc+LWVAZKLQqUtC y+zMdBbTj1vycCfeQN1LSjk7sMgFcCtm//nvZ6T8KNJWwAz19dvxAioiNSoj7NGR9pbs UpJkZNpYjowp/VWxNUKWywkbIGgE9KdbRsJqu70co7fJquTjPPUGw5HYby10E/dpDGwG ZkG9oTuCG5VE2yAbA75L3rn1i1hzt8vuJQTcqKin+iOPBMkzwUTWgCCL4k09JXl1eijO DP+088+KezS65c5G80sgmL0p6Z4gbVYCLfoWe8pNYfAVGUkqUGSVvbdGFi0d2oBBh5DA 8ijg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=SubjzKtYxDwDh8eAZSjb5LF7LaekSyXiSzaHJbGx46c=; b=zWIWpDUO2jtTKyB0giIuVZX956g2ic5QmXqHFrFSFk8QVPyqoNxnmaeLI41SpJ5K8X z12MiWygqf8Rz0pKiTwRA58jNKkdi0ckOE0OIfmHkxZml29+LYVg+m1kw38ZryV++9cz gLdMO5bAImiYihRexh2LQ+LoEKoSU+ZO38In5whpbaQ6laA1ZMy8vWIh4HkFa5rvw4Zv tQzOrk5MxpfM1Ksxe0/rJN2U+kWQ6VC5xJslp+HrdE8DB5Fp8HUmsHe0bMwbu9wIpCtO B6GiLNWH3dY+G2WlEycOmJz629/aHhjD76LBuZ6FVb9dD0wVWSJJS0t8v2M5MHev2Vyn 9MdQ== X-Gm-Message-State: ACgBeo1LZjHtzZ4AG5uyxBtTbEMZRE0+MQFqaYxsPbvfZw1tlSjGQ7S9 HzPT0ZGnst27J7f3i5S2kzekNQ== X-Google-Smtp-Source: AA6agR6uAIymTe7SBs7hQLYRkzepfVqH5J0cZPr2b2QFOnfJKDV5zb6tsgX3vckF3HVoYYBWmgo0sg== X-Received: by 2002:a17:902:bd8a:b0:16c:dfcf:38ba with SMTP id q10-20020a170902bd8a00b0016cdfcf38bamr23775277pls.35.1659495089834; Tue, 02 Aug 2022 19:51:29 -0700 (PDT) Received: from C02DV8HUMD6R.bytedance.net ([139.177.225.254]) by smtp.gmail.com with ESMTPSA id n12-20020a170902d2cc00b0016da68b09b3sm444774plc.87.2022.08.02.19.51.26 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 02 Aug 2022 19:51:29 -0700 (PDT) From: Abel Wu To: Andrew Morton , Vlastimil Babka , Michal Hocko , Mel Gorman , Muchun Song Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Abel Wu Subject: [PATCH] mm/page_alloc: only search higher order when fallback Date: Wed, 3 Aug 2022 10:51:21 +0800 Message-Id: <20220803025121.47018-1-wuyun.abel@bytedance.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It seems unnecessary to search pages with order < alloc_order in fallback allocation. Signed-off-by: Abel Wu --- mm/page_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index e008a3df0485..0abafc2fc3e0 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2934,7 +2934,7 @@ __rmqueue_fallback(struct zone *zone, int order, int start_migratetype, * i.e. orders < pageblock_order. If there are no local zones free, * the zonelists will be reiterated without ALLOC_NOFRAGMENT. */ - if (alloc_flags & ALLOC_NOFRAGMENT) + if (order < pageblock_order && alloc_flags & ALLOC_NOFRAGMENT) min_order = pageblock_order; /* -- 2.31.1