From patchwork Tue Mar 21 00:48:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zi Yan X-Patchwork-Id: 13182056 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD649C6FD1D for ; Tue, 21 Mar 2023 00:48:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229783AbjCUAs4 (ORCPT ); Mon, 20 Mar 2023 20:48:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56568 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229771AbjCUAsy (ORCPT ); Mon, 20 Mar 2023 20:48:54 -0400 Received: from out2-smtp.messagingengine.com (out2-smtp.messagingengine.com [66.111.4.26]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E1E3211653; Mon, 20 Mar 2023 17:48:51 -0700 (PDT) Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.nyi.internal (Postfix) with ESMTP id 1801D5C019D; Mon, 20 Mar 2023 20:48:51 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute1.internal (MEProxy); Mon, 20 Mar 2023 20:48:51 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sent.com; h=cc :cc:content-transfer-encoding:content-type: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=fm2; t= 1679359731; x=1679446131; bh=vAnKio6G1pyRKqUfraKaMDB3b315AuN4QEd NLYxwdsw=; b=y0X51D+LQ86Kr2xYgtguu+CJsOoj3uGl1Biz+j6wtuucwB8Ul7G 1WU7SRSXYafwqUPT96W18O3eN0WP6EQ6gZJBfE7X7FtfP2DjlchcHq/YTkuOYxX0 NzareEUASz6hZ/r+xDoITDNVfwTl1xVKrVc5i9Ssgcr3UH65mCtpXHwuEg36qoNo 8p5VAs4u3KNLaBS7ErqjpQTq4F/u/FWtG+3b/sSH8E+JHm0AON8fDrdhSX7zSOOb pGdaU3jrncLEPT4epAOqz8dVLoWgrIyeU+Cbs2RGABx8EmNtYBCNSC+g+u/r5J46 wioYomd8A8HnLYPzzvXocT345MYdbUScO6Q== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding :content-type:date:date:feedback-id:feedback-id: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=fm2; t= 1679359731; x=1679446131; bh=vAnKio6G1pyRKqUfraKaMDB3b315AuN4QEd NLYxwdsw=; b=f2iFj0LnxbayE/fbdq57CRZmIzsyJ82mp2azTzaS663PefKwqL+ E94QFUztNR9qdKpPQi4ujDylfOkDKesls2LeDiVSRazIzMyIqviHl1iwWZafTozc 0gvkT43UqlIKu9sAcuCWJPBuyQBgyzIuwA0rZhNdXZgYMmqQqWMKYZ/eJLVrIgWB UT1OekG3FNdH+NmxwVpnNgX4JYJrbhU8fNNr7lAHSCCYonAArOJalBP8mQQaXJWo kj7pNe1mn6Mu8vwuvKgPMhUyNS9iJCAZQDcCyd35kd4WNKm4lWLdHenocZOSV2vG +01s43WmMNNACWLTWXTyMemqRH/Jwc/5Cxg== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedrvdefledgvdegucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephffvvefufffkofgjfhhrggfgsedtqhertdertddtnecuhfhrohhmpegkihcu jggrnhcuoeiiihdrhigrnhesshgvnhhtrdgtohhmqeenucggtffrrghtthgvrhhnpeegge ehudfgudduvdelheehteegledtteeiveeuhfffveekhfevueefieeijeegvdenucevlhhu shhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpeiiihdrhigrnhessh gvnhhtrdgtohhm X-ME-Proxy: Feedback-ID: iccd040f4:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Mon, 20 Mar 2023 20:48:50 -0400 (EDT) From: Zi Yan To: "Matthew Wilcox (Oracle)" , Yang Shi , Yu Zhao , linux-mm@kvack.org Cc: Zi Yan , Andrew Morton , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH 2/5] mm: page_owner: add support for splitting to any order in split page_owner. Date: Mon, 20 Mar 2023 20:48:26 -0400 Message-Id: <20230321004829.2012847-3-zi.yan@sent.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230321004829.2012847-1-zi.yan@sent.com> References: <20230321004829.2012847-1-zi.yan@sent.com> Reply-To: Zi Yan MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org 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 --- include/linux/page_owner.h | 12 +++++++----- mm/huge_memory.c | 3 ++- mm/page_alloc.c | 6 +++--- mm/page_owner.c | 11 ++++++----- 4 files changed, 18 insertions(+), 14 deletions(-) diff --git a/include/linux/page_owner.h b/include/linux/page_owner.h index 119a0c9d2a8b..67d98de3d5a8 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 short old_order, + unsigned short 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 30e3e300c42e..710189885402 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2511,6 +2511,7 @@ 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; @@ -2556,7 +2557,7 @@ 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 59c2b6696698..ec85562865fb 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3530,7 +3530,7 @@ 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, 1); } EXPORT_SYMBOL_GPL(split_page); @@ -5746,8 +5746,8 @@ static void *make_alloc_exact(unsigned long addr, unsigned int order, struct page *page = virt_to_page((void *)addr); struct page *last = page + nr; - split_page_owner(page, 1 << order); - split_page_memcg(page, 1 << order); + split_page_owner(page, 1 << order, 1); + split_page_memcg(page, 1 << order, 1); while (page < --last) set_page_refcounted(last); diff --git a/mm/page_owner.c b/mm/page_owner.c index 31169b3e7f06..33d1b6efe6a6 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -211,19 +211,20 @@ void __set_page_owner_migrate_reason(struct page *page, int reason) page_ext_put(page_ext); } -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; + int i, old_nr = 1 << old_order, new_nr = 1 << new_order; struct page_ext *page_ext = page_ext_get(page); 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; } page_ext_put(page_ext); }