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,URIBL_BLOCKED,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 E74F7C433E0 for ; Tue, 7 Jul 2020 07:45:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BEA4A20758 for ; Tue, 7 Jul 2020 07:45:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Eok4t1VS" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726467AbgGGHpW (ORCPT ); Tue, 7 Jul 2020 03:45:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46178 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728300AbgGGHpV (ORCPT ); Tue, 7 Jul 2020 03:45:21 -0400 Received: from mail-pj1-x1043.google.com (mail-pj1-x1043.google.com [IPv6:2607:f8b0:4864:20::1043]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D2319C061755 for ; Tue, 7 Jul 2020 00:45:20 -0700 (PDT) Received: by mail-pj1-x1043.google.com with SMTP id b92so18168887pjc.4 for ; Tue, 07 Jul 2020 00:45:20 -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=7w5+1Hzjf18z/2o2/PilHVAz4Imm/6C4QWMh97XIOQc=; b=Eok4t1VStxGOWAzkWm8zcnnWYQ6dk6skFyuJ8nlZZnv7bK2671l1bF8AxXH6Z+E1nl +xIX7Z9ENHPCYzGuD3ecvpipA3JxVfK1AJRvwUYL1MuQJX2tbgscezorIGfdmAutjy9i oKl53WriyOznSdUXfkK84KUzCwL9g4vlhsCogXxwD6jtd2bA/Gi8mveKMF16P5CPg6sD F+p+ySX5Zxplp1t1T9j6t1JgBZn/jj4biHrZkYc0o70dZg0BaTVCao0qjWdb2W+4YTAT tPKXEdlSCjeKz3t3+fhbO5A8W8HxdFO//N+u+r1yMSmC2iyOy34xtjVyPNo54lzYI/Jm GSKA== 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=7w5+1Hzjf18z/2o2/PilHVAz4Imm/6C4QWMh97XIOQc=; b=qMlNUhRFJ/OkfMM3+GZNRRvuesOFvDuyGFESxI460vrzZz9u2jB1CdG0sdmzf6Hz1J RgptwpxQ+hxLsNasoy+QhpAuaTKMoskVucC48Lq1HtmQ73gnecNyRWC1IsDqeE4sF3+T 0J7/6nTEpTa1e3VvQSticIbgpcA+f/LDlDTmIpYjEoqgDr3jloQvDAGLFY2zUVVD5qkG 6oi+qWKwcLWi+/nMy4RCR/n3xlMmeZJB2HnJqqLeGVzhWyTlJqjylDD8UcDbaGdBOcHq ifaB3duHbSzP9KPZWWgMo7sNio80VS7k0V0WojwZg9xC+Y9v/Tj1aOadfCIodZlseyn4 mMnA== X-Gm-Message-State: AOAM530qTsFXEoWfbQUdUyIVK9Entd+sfja2K9G0Cy9eOfLYZW2tKiDz kkuqk10gpwcwIbdk4+VC+VPYpm45 X-Google-Smtp-Source: ABdhPJzKxbOEZngb7E5WhqmRHvRexoOxmzytcrzXDlvurQI7mrbOt9M/Sv99Iki3b6sJLDJ8CArhdg== X-Received: by 2002:a17:90a:de0c:: with SMTP id m12mr3109445pjv.228.1594107920405; Tue, 07 Jul 2020 00:45:20 -0700 (PDT) Received: from localhost.localdomain ([114.206.198.176]) by smtp.gmail.com with ESMTPSA id 191sm21330151pfw.150.2020.07.07.00.45.17 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 07 Jul 2020 00:45:20 -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 , Joonsoo Kim Subject: [PATCH v4 03/11] mm/hugetlb: unify migration callbacks Date: Tue, 7 Jul 2020 16:44:41 +0900 Message-Id: <1594107889-32228-4-git-send-email-iamjoonsoo.kim@lge.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1594107889-32228-1-git-send-email-iamjoonsoo.kim@lge.com> References: <1594107889-32228-1-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 There is no difference between two migration callback functions, alloc_huge_page_node() and alloc_huge_page_nodemask(), except __GFP_THISNODE handling. It's redundant to have two almost similar functions in order to handle this flag. So, this patch tries to remove one by introducing a new argument, gfp_mask, to alloc_huge_page_nodemask(). After introducing gfp_mask argument, it's caller's job to provide correct gfp_mask. So, every callsites for alloc_huge_page_nodemask() are changed to provide gfp_mask. Note that it's safe to remove a node id check in alloc_huge_page_node() since there is no caller passing NUMA_NO_NODE as a node id. Reviewed-by: Mike Kravetz Signed-off-by: Joonsoo Kim --- include/linux/hugetlb.h | 26 ++++++++++++++++++-------- mm/hugetlb.c | 35 ++--------------------------------- mm/mempolicy.c | 10 ++++++---- mm/migrate.c | 11 +++++++---- 4 files changed, 33 insertions(+), 49 deletions(-) diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 50650d0..bb93e95 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -10,6 +10,7 @@ #include #include #include +#include struct ctl_table; struct user_struct; @@ -504,9 +505,8 @@ struct huge_bootmem_page { struct page *alloc_huge_page(struct vm_area_struct *vma, unsigned long addr, int avoid_reserve); -struct page *alloc_huge_page_node(struct hstate *h, int nid); struct page *alloc_huge_page_nodemask(struct hstate *h, int preferred_nid, - nodemask_t *nmask); + nodemask_t *nmask, gfp_t gfp_mask); struct page *alloc_huge_page_vma(struct hstate *h, struct vm_area_struct *vma, unsigned long address); struct page *alloc_migrate_huge_page(struct hstate *h, gfp_t gfp_mask, @@ -692,6 +692,15 @@ static inline bool hugepage_movable_supported(struct hstate *h) return true; } +/* Movability of hugepages depends on migration support. */ +static inline gfp_t htlb_alloc_mask(struct hstate *h) +{ + if (hugepage_movable_supported(h)) + return GFP_HIGHUSER_MOVABLE; + else + return GFP_HIGHUSER; +} + static inline spinlock_t *huge_pte_lockptr(struct hstate *h, struct mm_struct *mm, pte_t *pte) { @@ -759,13 +768,9 @@ static inline struct page *alloc_huge_page(struct vm_area_struct *vma, return NULL; } -static inline struct page *alloc_huge_page_node(struct hstate *h, int nid) -{ - return NULL; -} - static inline struct page * -alloc_huge_page_nodemask(struct hstate *h, int preferred_nid, nodemask_t *nmask) +alloc_huge_page_nodemask(struct hstate *h, int preferred_nid, + nodemask_t *nmask, gfp_t gfp_mask) { return NULL; } @@ -878,6 +883,11 @@ static inline bool hugepage_movable_supported(struct hstate *h) return false; } +static inline gfp_t htlb_alloc_mask(struct hstate *h) +{ + return 0; +} + static inline spinlock_t *huge_pte_lockptr(struct hstate *h, struct mm_struct *mm, pte_t *pte) { diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 7e5ba5c0..3245aa0 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1089,15 +1089,6 @@ static struct page *dequeue_huge_page_nodemask(struct hstate *h, gfp_t gfp_mask, return NULL; } -/* Movability of hugepages depends on migration support. */ -static inline gfp_t htlb_alloc_mask(struct hstate *h) -{ - if (hugepage_movable_supported(h)) - return GFP_HIGHUSER_MOVABLE; - else - return GFP_HIGHUSER; -} - static struct page *dequeue_huge_page_vma(struct hstate *h, struct vm_area_struct *vma, unsigned long address, int avoid_reserve, @@ -1979,31 +1970,9 @@ struct page *alloc_buddy_huge_page_with_mpol(struct hstate *h, } /* page migration callback function */ -struct page *alloc_huge_page_node(struct hstate *h, int nid) -{ - gfp_t gfp_mask = htlb_alloc_mask(h); - struct page *page = NULL; - - if (nid != NUMA_NO_NODE) - gfp_mask |= __GFP_THISNODE; - - spin_lock(&hugetlb_lock); - if (h->free_huge_pages - h->resv_huge_pages > 0) - page = dequeue_huge_page_nodemask(h, gfp_mask, nid, NULL); - spin_unlock(&hugetlb_lock); - - if (!page) - page = alloc_migrate_huge_page(h, gfp_mask, nid, NULL); - - return page; -} - -/* page migration callback function */ struct page *alloc_huge_page_nodemask(struct hstate *h, int preferred_nid, - nodemask_t *nmask) + nodemask_t *nmask, gfp_t gfp_mask) { - gfp_t gfp_mask = htlb_alloc_mask(h); - spin_lock(&hugetlb_lock); if (h->free_huge_pages - h->resv_huge_pages > 0) { struct page *page; @@ -2031,7 +2000,7 @@ struct page *alloc_huge_page_vma(struct hstate *h, struct vm_area_struct *vma, gfp_mask = htlb_alloc_mask(h); node = huge_node(vma, address, gfp_mask, &mpol, &nodemask); - page = alloc_huge_page_nodemask(h, node, nodemask); + page = alloc_huge_page_nodemask(h, node, nodemask, gfp_mask); mpol_cond_put(mpol); return page; diff --git a/mm/mempolicy.c b/mm/mempolicy.c index dabcee8..9034a53 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -1068,10 +1068,12 @@ static int migrate_page_add(struct page *page, struct list_head *pagelist, /* page allocation callback for NUMA node migration */ struct page *alloc_new_node_page(struct page *page, unsigned long node) { - if (PageHuge(page)) - return alloc_huge_page_node(page_hstate(compound_head(page)), - node); - else if (PageTransHuge(page)) { + if (PageHuge(page)) { + struct hstate *h = page_hstate(compound_head(page)); + gfp_t gfp_mask = htlb_alloc_mask(h) | __GFP_THISNODE; + + return alloc_huge_page_nodemask(h, node, NULL, gfp_mask); + } else if (PageTransHuge(page)) { struct page *thp; thp = alloc_pages_node(node, diff --git a/mm/migrate.c b/mm/migrate.c index 7370a66..3b3d918 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1538,10 +1538,13 @@ struct page *new_page_nodemask(struct page *page, unsigned int order = 0; struct page *new_page = NULL; - if (PageHuge(page)) - return alloc_huge_page_nodemask( - page_hstate(compound_head(page)), - preferred_nid, nodemask); + if (PageHuge(page)) { + struct hstate *h = page_hstate(compound_head(page)); + + gfp_mask = htlb_alloc_mask(h); + return alloc_huge_page_nodemask(h, preferred_nid, + nodemask, gfp_mask); + } if (PageTransHuge(page)) { gfp_mask |= GFP_TRANSHUGE; -- 2.7.4