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=-13.1 required=3.0 tests=BAYES_00,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 0B6E9C433E3 for ; Wed, 15 Jul 2020 05:05:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D72F22074B for ; Wed, 15 Jul 2020 05:05:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="nuj/Shff" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728092AbgGOFFt (ORCPT ); Wed, 15 Jul 2020 01:05:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49124 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725917AbgGOFFs (ORCPT ); Wed, 15 Jul 2020 01:05:48 -0400 Received: from mail-pl1-x643.google.com (mail-pl1-x643.google.com [IPv6:2607:f8b0:4864:20::643]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ADCE2C061755 for ; Tue, 14 Jul 2020 22:05:48 -0700 (PDT) Received: by mail-pl1-x643.google.com with SMTP id m16so1843526pls.5 for ; Tue, 14 Jul 2020 22:05:48 -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=e7byfgHw8QS4EFeIqD5PDYqTNizYFOWzHsxHEo0G+W4=; b=nuj/ShffpoKXVL9Twu4mnjAAGc6trFyAcytARH/jXA7FlxltODfayDtDpf3tZp1bnZ 5ypy2TkSdXVby/FZBmOXGUDefNSH0TGR13s3r4SKlgdonIe+fsACRrFKRNNk320EFflm AeALOCBkibmcwxa7uwGTJIVolr1eOLLqolSKKkmPOhXbyrGyg6RJoA+RRDaBKXL9fa9k qtwjlV1STLsyeJqe/98Rao5M1fvvsBBbhoIanlqO03o5kwLS9IKwqKL4CRDs8HZQ6Yf2 w0XSLF5CqORruKWR0AQCERc/RXk3488q4N6tCnkMxZaqSaUKj/ofOm91Rf7WArXa8FSK sy0w== 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=e7byfgHw8QS4EFeIqD5PDYqTNizYFOWzHsxHEo0G+W4=; b=BZYlMql94WM3lED4aRY8KP5ORPBQOwHLMH/BN9jIWisaAMSdWZyBre2biYTzcg0LSH LYYkMNUEwXqvmm49xPWpuIgZH25f3NMqt4+6UeB+4RT11jvlhBxkFEuXWIvjJkNCV+JA IqvFa5XkqWxVIAZKMcC9BqLsLWCaf4MDPxMrAvbz9CLHbFhtKJTdUQEMIuKm+8aeYEmF dAP79/eaE1Zplc9X2w4sfKCkg4qx4A02G6KS4H8dybOWijUicF77kXWCu5bC2XDUjHNl 9fedv/RfsqVnyPbIDsJRvOGyzrmCpFqLn5Q8wY1lB2gdrQ2H08Jva/f/d0lqqwGMU0qb pEDg== X-Gm-Message-State: AOAM5319jF3XWjWbL5S2E8NXJH53FL7WvGkK6J29UfD8mQWHvVKpYkKT L0tltcYZ/wYyFETuLgbPH4Y= X-Google-Smtp-Source: ABdhPJyEk74SdinwCEymCOZL8TIvU3lrpB1LNieqQ+aiZb/vLtcI8gc4oa2hwcSXm4m0mHX4JQjJvQ== X-Received: by 2002:a17:90a:a393:: with SMTP id x19mr8520227pjp.228.1594789548231; Tue, 14 Jul 2020 22:05:48 -0700 (PDT) Received: from localhost.localdomain ([114.206.198.176]) by smtp.gmail.com with ESMTPSA id i21sm747251pfa.18.2020.07.14.22.05.45 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 14 Jul 2020 22:05:47 -0700 (PDT) From: js1304@gmail.com X-Google-Original-From: iamjoonsoo.kim@lge.com To: Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@lge.com, Vlastimil Babka , Christoph Hellwig , Roman Gushchin , Mike Kravetz , Naoya Horiguchi , Michal Hocko , "Aneesh Kumar K . V" , Joonsoo Kim Subject: [PATCH 2/4] mm/gup: restrict CMA region by using allocation scope API Date: Wed, 15 Jul 2020 14:05:27 +0900 Message-Id: <1594789529-6206-2-git-send-email-iamjoonsoo.kim@lge.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1594789529-6206-1-git-send-email-iamjoonsoo.kim@lge.com> References: <1594789529-6206-1-git-send-email-iamjoonsoo.kim@lge.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Joonsoo Kim We have well defined scope API to exclude CMA region. Use it rather than manipulating gfp_mask manually. With this change, we can now use __GFP_MOVABLE for gfp_mask and the ZONE_MOVABLE is also searched by page allocator. For hugetlb, gfp_mask is redefined since it has a regular allocation mask filter for migration target. Note that this can be considered as a fix for the commit 9a4e9f3b2d73 ("mm: update get_user_pages_longterm to migrate pages allocated from CMA region"). However, "Fixes" tag isn't added here since it is just suboptimal but it doesn't cause any problem. Suggested-by: Michal Hocko Signed-off-by: Joonsoo Kim --- include/linux/hugetlb.h | 2 ++ mm/gup.c | 17 ++++++++--------- 2 files changed, 10 insertions(+), 9 deletions(-) diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 6b9508d..2660b04 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -708,6 +708,8 @@ static inline gfp_t htlb_modify_alloc_mask(struct hstate *h, gfp_t gfp_mask) /* Some callers might want to enfoce node */ modified_mask |= (gfp_mask & __GFP_THISNODE); + modified_mask |= (gfp_mask & __GFP_NOWARN); + return modified_mask; } diff --git a/mm/gup.c b/mm/gup.c index 5daadae..bbd36a1 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -1619,10 +1619,12 @@ static struct page *new_non_cma_page(struct page *page, unsigned long private) * Trying to allocate a page for migration. Ignore allocation * failure warnings. We don't force __GFP_THISNODE here because * this node here is the node where we have CMA reservation and - * in some case these nodes will have really less non movable + * in some case these nodes will have really less non CMA * allocation memory. + * + * Note that CMA region is prohibited by allocation scope. */ - gfp_t gfp_mask = GFP_USER | __GFP_NOWARN; + gfp_t gfp_mask = GFP_USER | __GFP_MOVABLE | __GFP_NOWARN; if (PageHighMem(page)) gfp_mask |= __GFP_HIGHMEM; @@ -1630,6 +1632,8 @@ static struct page *new_non_cma_page(struct page *page, unsigned long private) #ifdef CONFIG_HUGETLB_PAGE if (PageHuge(page)) { struct hstate *h = page_hstate(page); + + gfp_mask = htlb_modify_alloc_mask(h, gfp_mask); /* * We don't want to dequeue from the pool because pool pages will * mostly be from the CMA region. @@ -1644,11 +1648,6 @@ static struct page *new_non_cma_page(struct page *page, unsigned long private) */ gfp_t thp_gfpmask = GFP_TRANSHUGE | __GFP_NOWARN; - /* - * Remove the movable mask so that we don't allocate from - * CMA area again. - */ - thp_gfpmask &= ~__GFP_MOVABLE; thp = __alloc_pages_node(nid, thp_gfpmask, HPAGE_PMD_ORDER); if (!thp) return NULL; @@ -1794,7 +1793,6 @@ static long __gup_longterm_locked(struct task_struct *tsk, vmas_tmp, NULL, gup_flags); if (gup_flags & FOLL_LONGTERM) { - memalloc_nocma_restore(flags); if (rc < 0) goto out; @@ -1807,9 +1805,10 @@ static long __gup_longterm_locked(struct task_struct *tsk, rc = check_and_migrate_cma_pages(tsk, mm, start, rc, pages, vmas_tmp, gup_flags); +out: + memalloc_nocma_restore(flags); } -out: if (vmas_tmp != vmas) kfree(vmas_tmp); return rc; -- 2.7.4