From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-f198.google.com (mail-qk0-f198.google.com [209.85.220.198]) by kanga.kvack.org (Postfix) with ESMTP id 528BC6B0271 for ; Sun, 5 Feb 2017 11:14:36 -0500 (EST) Received: by mail-qk0-f198.google.com with SMTP id u25so31184000qki.3 for ; Sun, 05 Feb 2017 08:14:36 -0800 (PST) Received: from out1-smtp.messagingengine.com (out1-smtp.messagingengine.com. [66.111.4.25]) by mx.google.com with ESMTPS id k143si23298852qke.77.2017.02.05.08.14.35 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 05 Feb 2017 08:14:35 -0800 (PST) From: Zi Yan Subject: [PATCH v3 13/14] mm: migrate: move_pages() supports thp migration Date: Sun, 5 Feb 2017 11:12:51 -0500 Message-Id: <20170205161252.85004-14-zi.yan@sent.com> In-Reply-To: <20170205161252.85004-1-zi.yan@sent.com> References: <20170205161252.85004-1-zi.yan@sent.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, kirill.shutemov@linux.intel.com Cc: akpm@linux-foundation.org, minchan@kernel.org, vbabka@suse.cz, mgorman@techsingularity.net, n-horiguchi@ah.jp.nec.com, khandual@linux.vnet.ibm.com, zi.yan@cs.rutgers.edu From: Naoya Horiguchi This patch enables thp migration for move_pages(2). Signed-off-by: Naoya Horiguchi --- mm/migrate.c | 37 ++++++++++++++++++++++++++++--------- 1 file changed, 28 insertions(+), 9 deletions(-) diff --git a/mm/migrate.c b/mm/migrate.c index 84181a3668c6..9bcaccb481ac 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1413,7 +1413,17 @@ static struct page *new_page_node(struct page *p, unsigned long private, if (PageHuge(p)) return alloc_huge_page_node(page_hstate(compound_head(p)), pm->node); - else + else if (thp_migration_supported() && PageTransHuge(p)) { + struct page *thp; + + thp = alloc_pages_node(pm->node, + (GFP_TRANSHUGE | __GFP_THISNODE) & ~__GFP_RECLAIM, + HPAGE_PMD_ORDER); + if (!thp) + return NULL; + prep_transhuge_page(thp); + return thp; + } else return __alloc_pages_node(pm->node, GFP_HIGHUSER_MOVABLE | __GFP_THISNODE, 0); } @@ -1440,6 +1450,8 @@ static int do_move_page_to_node_array(struct mm_struct *mm, for (pp = pm; pp->node != MAX_NUMNODES; pp++) { struct vm_area_struct *vma; struct page *page; + struct page *head; + unsigned int follflags; err = -EFAULT; vma = find_vma(mm, pp->addr); @@ -1447,8 +1459,10 @@ static int do_move_page_to_node_array(struct mm_struct *mm, goto set_status; /* FOLL_DUMP to ignore special (like zero) pages */ - page = follow_page(vma, pp->addr, - FOLL_GET | FOLL_SPLIT | FOLL_DUMP); + follflags = FOLL_GET | FOLL_SPLIT | FOLL_DUMP; + if (!thp_migration_supported()) + follflags |= FOLL_SPLIT; + page = follow_page(vma, pp->addr, follflags); err = PTR_ERR(page); if (IS_ERR(page)) @@ -1458,7 +1472,6 @@ static int do_move_page_to_node_array(struct mm_struct *mm, if (!page) goto set_status; - pp->page = page; err = page_to_nid(page); if (err == pp->node) @@ -1473,16 +1486,22 @@ static int do_move_page_to_node_array(struct mm_struct *mm, goto put_and_set; if (PageHuge(page)) { - if (PageHead(page)) + if (PageHead(page)) { isolate_huge_page(page, &pagelist); + err = 0; + pp->page = page; + } goto put_and_set; } - err = isolate_lru_page(page); + pp->page = compound_head(page); + head = compound_head(page); + err = isolate_lru_page(head); if (!err) { - list_add_tail(&page->lru, &pagelist); - inc_node_page_state(page, NR_ISOLATED_ANON + - page_is_file_cache(page)); + list_add_tail(&head->lru, &pagelist); + mod_node_page_state(page_pgdat(head), + NR_ISOLATED_ANON + page_is_file_cache(head), + hpage_nr_pages(head)); } put_and_set: /* -- 2.11.0 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org