From patchwork Mon Mar 21 14:21:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zi Yan X-Patchwork-Id: 12787304 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id E67A5C433EF for ; Mon, 21 Mar 2022 14:21:40 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 3E2818D0002; Mon, 21 Mar 2022 10:21:39 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 394218D0001; Mon, 21 Mar 2022 10:21:39 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 0373B8D0002; Mon, 21 Mar 2022 10:21:38 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0035.hostedemail.com [216.40.44.35]) by kanga.kvack.org (Postfix) with ESMTP id E57608D0001 for ; Mon, 21 Mar 2022 10:21:38 -0400 (EDT) Received: from smtpin28.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 973EF8249980 for ; Mon, 21 Mar 2022 14:21:38 +0000 (UTC) X-FDA: 79268606676.28.5BD7C39 Received: from out3-smtp.messagingengine.com (out3-smtp.messagingengine.com [66.111.4.27]) by imf15.hostedemail.com (Postfix) with ESMTP id 03457A0008 for ; Mon, 21 Mar 2022 14:21:37 +0000 (UTC) Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailout.nyi.internal (Postfix) with ESMTP id A92A15C01C7; Mon, 21 Mar 2022 10:21:37 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute4.internal (MEProxy); Mon, 21 Mar 2022 10:21:37 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sent.com; h=cc :cc:content-transfer-encoding:date:date:from:from:in-reply-to :in-reply-to:message-id:mime-version:references:reply-to :reply-to:sender:subject:subject:to:to; s=fm3; bh=+/Wp7/w8DInb8D 6QqZ6ciS73TAw3rM4RvE2nNIS9rTw=; b=nJwqj/l0JgzTMam8BnG9lxPaM1+x+A 7+BLwRD6YpZFX/4SGSM+zGhlBll/868j4rmMy4wHqx6S/Mhbm7N4MK9SIMk07/Sv lyV+mK7PvJPSi1ceMe7ksQxi1gAqjbX2F6kwzIqpktkQ097Urt1FGrX6qyRmQFrb Z0WWiVBSIEKHUEFI+zxb2+jVSYMR63BVvIgP+hRfHbUbih+D4S49xQfOrtvmg0lG jrFkgswGEkYcymBxevlpmm5BnAbwNvr4/FGF3as2cIL1LiusHSWPeYd9wYbYMiVh QSe0r8SltxpC4q3F4ZwVLFEBH2mUZrEyMVH1EGfftoTNrIr/UP+qIccQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding:date:date :from:from:in-reply-to:in-reply-to:message-id:mime-version :references:reply-to:reply-to:sender:subject:subject:to:to :x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm3; bh=+/Wp7/w8DInb8D6QqZ6ciS73TAw3rM4RvE2nNIS9rTw=; b=o1C99GeY L7HpALqGAWJawa5uOAHc04OvriLZIsh8ZFIgj1UAYmVMs+7Hb062PRIlyk1gSdH2 De5V7tZVHYQ9VhlQzoBzbMk1A0qyRk8pZG1Vc91b6Rp5vrdGwVAiEnX/U5siTzco iQwRe0WmSn1VmRcjQ6AdmrktO7DtR/V01OWycm0Usw22pj8SbSh/OEkEZHn4UlXJ 0W4zDMwokwtIEgvEaUwU9PzDQ5AAoaSCqi4PSG7MvOuuMWhvj3ni+DXFNfrbId3x 0t9+SjJ6a3yBxWwAzeuHBijO12paNSSff/whVfOHeuRtl80fluF8lC7CWV10ba0A bSP98/ubPnwGlA== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvvddrudegfedgieegucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephffvufffkffojghfrhgggfestdhqredtredttdenucfhrhhomhepkghiucgj rghnuceoiihirdihrghnsehsvghnthdrtghomheqnecuggftrfgrthhtvghrnhepieejue dvueduuefhgefhheeiuedvtedvuefgieegveetueeiueehtdegudehfeelnecuvehluhhs thgvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomhepiihirdihrghnsehsvg hnthdrtghomh X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Mon, 21 Mar 2022 10:21:37 -0400 (EDT) From: Zi Yan To: Matthew Wilcox , linux-mm@kvack.org Cc: Roman Gushchin , Shuah Khan , Yang Shi , Miaohe Lin , Hugh Dickins , "Kirill A . Shutemov" , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-kselftest@vger.kernel.org, Zi Yan Subject: [RFC PATCH 2/5] mm: page_owner: add support for splitting to any order in split page_owner. Date: Mon, 21 Mar 2022 10:21:25 -0400 Message-Id: <20220321142128.2471199-3-zi.yan@sent.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220321142128.2471199-1-zi.yan@sent.com> References: <20220321142128.2471199-1-zi.yan@sent.com> Reply-To: Zi Yan MIME-Version: 1.0 X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 03457A0008 X-Stat-Signature: g5w7z1yanth66ccm7rm1r73ywioh993u Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=sent.com header.s=fm3 header.b="nJwqj/l0"; dkim=pass header.d=messagingengine.com header.s=fm3 header.b=o1C99GeY; dmarc=pass (policy=none) header.from=sent.com; spf=pass (imf15.hostedemail.com: domain of zi.yan@sent.com designates 66.111.4.27 as permitted sender) smtp.mailfrom=zi.yan@sent.com X-HE-Tag: 1647872497-568983 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Zi Yan It adds a new_order parameter to set new page order in page owner and uses old_order instead of nr to make the parameters look consistent. It prepares for upcoming changes to support split huge page to any lower order. Signed-off-by: Zi Yan Reviewed-by: Roman Gushchin --- include/linux/page_owner.h | 12 +++++++----- mm/huge_memory.c | 3 ++- mm/page_alloc.c | 2 +- mm/page_owner.c | 13 +++++++------ 4 files changed, 17 insertions(+), 13 deletions(-) diff --git a/include/linux/page_owner.h b/include/linux/page_owner.h index 119a0c9d2a8b..16050cc89274 100644 --- a/include/linux/page_owner.h +++ b/include/linux/page_owner.h @@ -11,7 +11,8 @@ extern struct page_ext_operations page_owner_ops; extern void __reset_page_owner(struct page *page, unsigned short order); extern void __set_page_owner(struct page *page, unsigned short order, gfp_t gfp_mask); -extern void __split_page_owner(struct page *page, unsigned int nr); +extern void __split_page_owner(struct page *page, unsigned short old_order, + unsigned short new_order); extern void __folio_copy_owner(struct folio *newfolio, struct folio *old); extern void __set_page_owner_migrate_reason(struct page *page, int reason); extern void __dump_page_owner(const struct page *page); @@ -31,10 +32,11 @@ 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 nr) +static inline void split_page_owner(struct page *page, unsigned int old_order, + unsigned int new_order) { if (static_branch_unlikely(&page_owner_inited)) - __split_page_owner(page, nr); + __split_page_owner(page, old_order, new_order); } static inline void folio_copy_owner(struct folio *newfolio, struct folio *old) { @@ -56,11 +58,11 @@ static inline void reset_page_owner(struct page *page, unsigned short order) { } static inline void set_page_owner(struct page *page, - unsigned int order, gfp_t gfp_mask) + unsigned short order, gfp_t gfp_mask) { } static inline void split_page_owner(struct page *page, - unsigned short order) + unsigned short old_order, unsigned short new_order) { } static inline void folio_copy_owner(struct folio *newfolio, struct folio *folio) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 640040c386f0..fcfa46af6c4c 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2367,6 +2367,7 @@ static void __split_huge_page(struct page *page, struct list_head *list, struct lruvec *lruvec; struct address_space *swap_cache = NULL; unsigned long offset = 0; + unsigned int order = thp_order(head); unsigned int nr = thp_nr_pages(head); int i; @@ -2408,7 +2409,7 @@ static void __split_huge_page(struct page *page, struct list_head *list, unlock_page_lruvec(lruvec); /* Caller disabled irqs, so they are still disabled here */ - split_page_owner(head, nr); + split_page_owner(head, order, 0); /* See comment in __split_huge_page_tail() */ if (PageAnon(head)) { diff --git a/mm/page_alloc.c b/mm/page_alloc.c index d982919b9e51..9cac40c26c58 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3514,7 +3514,7 @@ 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, 1 << order); + split_page_owner(page, order, 0); split_page_memcg(page, 1 << order, 0); } EXPORT_SYMBOL_GPL(split_page); diff --git a/mm/page_owner.c b/mm/page_owner.c index 0a9588506571..52013c846d19 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -202,19 +202,20 @@ 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 nr) +void __split_page_owner(struct page *page, unsigned short old_order, + unsigned short new_order) { - int i; - struct page_ext *page_ext = lookup_page_ext(page); + int i, old_nr = 1 << old_order, new_nr = 1 << new_order; + struct page_ext *page_ext; struct page_owner *page_owner; if (unlikely(!page_ext)) return; - for (i = 0; i < nr; i++) { + for (i = 0; i < old_nr; i += new_nr) { + page_ext = lookup_page_ext(page + i); page_owner = get_page_owner(page_ext); - page_owner->order = 0; - page_ext = page_ext_next(page_ext); + page_owner->order = new_order; } }