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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 27370C55178 for ; Tue, 27 Oct 2020 16:48:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C093B22258 for ; Tue, 27 Oct 2020 16:48:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603817285; bh=v8/WWB4L/AwTghp4Gog+Xtt8D9h25zT1Kon5Hlg2OgE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=q0dYXGjyEwjxaxjfKfpxiSRwLe+r8QRkebrSG5tU/n58Jt9dDACZm9e3CeF5bgxIA bS6bdftAy6ScWAQEOsu0Ten+ElUCVTkC4AEJPYF0eBm+NK0Xp4Tk+iAt1VEMSS/VSK NtSBNRwdi6R4d+7UaUd4DOmKx2kGwoi63eN4plOg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1813095AbgJ0QsE (ORCPT ); Tue, 27 Oct 2020 12:48:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:34278 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S368862AbgJ0PmK (ORCPT ); Tue, 27 Oct 2020 11:42:10 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D12C6223C6; Tue, 27 Oct 2020 15:42:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603813327; bh=v8/WWB4L/AwTghp4Gog+Xtt8D9h25zT1Kon5Hlg2OgE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PAc7LSwB/WAPzcIsIc252Ty7W8/AUsce0yaVeEAnhlpjE4tlRbKm81NvkyvvBEvUV Nkx6HzEopMXptmpN3fbPAEhUsBTkIpyJzXDGlaAyerxXbhszLrNNbs0j6K951yR6x9 xwj0Ej0oZmtxFa4bKqOjTogfnVorrt/+0yC7g460= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Matthew Wilcox (Oracle)" , Andrew Morton , SeongJae Park , "Kirill A. Shutemov" , Huang Ying , Linus Torvalds , Sasha Levin Subject: [PATCH 5.9 507/757] mm/page_owner: change split_page_owner to take a count Date: Tue, 27 Oct 2020 14:52:37 +0100 Message-Id: <20201027135514.240450276@linuxfoundation.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027135450.497324313@linuxfoundation.org> References: <20201027135450.497324313@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Matthew Wilcox (Oracle) [ Upstream commit 8fb156c9ee2db94f7127c930c89917634a1a9f56 ] The implementation of split_page_owner() prefers a count rather than the old order of the page. When we support a variable size THP, we won't have the order at this point, but we will have the number of pages. So change the interface to what the caller and callee would prefer. Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: Andrew Morton Reviewed-by: SeongJae Park Acked-by: Kirill A. Shutemov Cc: Huang Ying Link: https://lkml.kernel.org/r/20200908195539.25896-4-willy@infradead.org Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin --- include/linux/page_owner.h | 6 +++--- mm/huge_memory.c | 2 +- mm/page_alloc.c | 2 +- mm/page_owner.c | 4 ++-- 4 files changed, 7 insertions(+), 7 deletions(-) diff --git a/include/linux/page_owner.h b/include/linux/page_owner.h index 8679ccd722e89..3468794f83d23 100644 --- a/include/linux/page_owner.h +++ b/include/linux/page_owner.h @@ -11,7 +11,7 @@ extern struct page_ext_operations page_owner_ops; extern void __reset_page_owner(struct page *page, unsigned int order); extern void __set_page_owner(struct page *page, unsigned int order, gfp_t gfp_mask); -extern void __split_page_owner(struct page *page, unsigned int order); +extern void __split_page_owner(struct page *page, unsigned int nr); extern void __copy_page_owner(struct page *oldpage, struct page *newpage); extern void __set_page_owner_migrate_reason(struct page *page, int reason); extern void __dump_page_owner(struct page *page); @@ -31,10 +31,10 @@ static inline void set_page_owner(struct page *page, __set_page_owner(page, order, gfp_mask); } -static inline void split_page_owner(struct page *page, unsigned int order) +static inline void split_page_owner(struct page *page, unsigned int nr) { if (static_branch_unlikely(&page_owner_inited)) - __split_page_owner(page, order); + __split_page_owner(page, nr); } static inline void copy_page_owner(struct page *oldpage, struct page *newpage) { diff --git a/mm/huge_memory.c b/mm/huge_memory.c index da397779a6d43..dbac774103769 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2451,7 +2451,7 @@ static void __split_huge_page(struct page *page, struct list_head *list, ClearPageCompound(head); - split_page_owner(head, HPAGE_PMD_ORDER); + split_page_owner(head, HPAGE_PMD_NR); /* See comment in __split_huge_page_tail() */ if (PageAnon(head)) { diff --git a/mm/page_alloc.c b/mm/page_alloc.c index d99c2db7f254f..3fb35fe6a9e44 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3209,7 +3209,7 @@ void split_page(struct page *page, unsigned int order) for (i = 1; i < (1 << order); i++) set_page_refcounted(page + i); - split_page_owner(page, order); + split_page_owner(page, 1 << order); } EXPORT_SYMBOL_GPL(split_page); diff --git a/mm/page_owner.c b/mm/page_owner.c index 3604615094235..4ca3051a10358 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -204,7 +204,7 @@ void __set_page_owner_migrate_reason(struct page *page, int reason) page_owner->last_migrate_reason = reason; } -void __split_page_owner(struct page *page, unsigned int order) +void __split_page_owner(struct page *page, unsigned int nr) { int i; struct page_ext *page_ext = lookup_page_ext(page); @@ -213,7 +213,7 @@ void __split_page_owner(struct page *page, unsigned int order) if (unlikely(!page_ext)) return; - for (i = 0; i < (1 << order); i++) { + for (i = 0; i < nr; i++) { page_owner = get_page_owner(page_ext); page_owner->order = 0; page_ext = page_ext_next(page_ext); -- 2.25.1