From nobody Fri Dec 19 04:14:25 2025 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 561E54D8CF for ; Thu, 29 Aug 2024 16:57:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724950633; cv=none; b=br6p3++sdqUYpuZavrqluJsfsli8pwfZLDXonSTspkA5ejVWwW/UPosbjwDG/G6llqfij79Vt0gzM9Nai3eIGrDf8SSXGJoUzQYuYWckc26LvIV55mZh9sj+LuhZkOyxPhQf5S2BjE9IS+lkplMEuQB56bo02NIvMJN/pl2rc64= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724950633; c=relaxed/simple; bh=mRUSwjzIKgUm6C6IsJ/V836vgCXG/9gWFoTwA7mi2ik=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VEElaO+qMEtPrdKhb0hmYdaF7gVQtmMc+p1qZ9QHgAZ2Drzr/jWGn1ZX23Dj0vWf6Xew+YCuAB9+GDCNvIHAExojDZx1+L+fQzngJ/sGlg9Lhl57RUXx6gBoWeFBNv/f+xCYduZs4vPmQxwqxO+cILYiotajH46KVShZeiSQ7S8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=YrdyQEwa; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="YrdyQEwa" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1724950630; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=2JqLQO5zRqaD9D1zDEVy24po9QCWNVhICktX5RsFGi4=; b=YrdyQEwaSaqFZhPQgam48i9cORkN1gDb/UujOAcMlT3vpkLN4S+kHQijyPXrRnTiFjEhsi eea4GrThgZ031RwjtZqUO4Gj70zd8i7v1ARMveTz2D3C6/Y0DpcqyjjrDTOMi8FZh1gWrm 1eY8eMkYv764xY4elXfzUwKGD2hKPnA= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-654-Dwmx9zCBO_qNwGe7_gEFEw-1; Thu, 29 Aug 2024 12:57:03 -0400 X-MC-Unique: Dwmx9zCBO_qNwGe7_gEFEw-1 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 8FBF21955D52; Thu, 29 Aug 2024 16:56:58 +0000 (UTC) Received: from t14s.redhat.com (unknown [10.39.193.245]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 02D9E1955F21; Thu, 29 Aug 2024 16:56:47 +0000 (UTC) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, cgroups@vger.kernel.org, x86@kernel.org, linux-fsdevel@vger.kernel.org, David Hildenbrand , Andrew Morton , "Matthew Wilcox (Oracle)" , Tejun Heo , Zefan Li , Johannes Weiner , =?UTF-8?q?Michal=20Koutn=C3=BD?= , Jonathan Corbet , Andy Lutomirski , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen Subject: [PATCH v1 01/17] mm: factor out large folio handling from folio_order() into folio_large_order() Date: Thu, 29 Aug 2024 18:56:04 +0200 Message-ID: <20240829165627.2256514-2-david@redhat.com> In-Reply-To: <20240829165627.2256514-1-david@redhat.com> References: <20240829165627.2256514-1-david@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Content-Type: text/plain; charset="utf-8" Let's factor it out into a simple helper function. This helper will also come in handy when working with code where we know that our folio is large. Signed-off-by: David Hildenbrand Reviewed-by: Kirill A. Shutemov Reviewed-by: Lance Yang --- include/linux/mm.h | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index b31d4bdd65ad5..3c6270f87bdc3 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1071,6 +1071,11 @@ int vma_is_stack_for_current(struct vm_area_struct *= vma); struct mmu_gather; struct inode; =20 +static inline unsigned int folio_large_order(const struct folio *folio) +{ + return folio->_flags_1 & 0xff; +} + /* * compound_order() can be called without holding a reference, which means * that niceties like page_folio() don't work. These callers should be @@ -1084,7 +1089,7 @@ static inline unsigned int compound_order(struct page= *page) =20 if (!test_bit(PG_head, &folio->flags)) return 0; - return folio->_flags_1 & 0xff; + return folio_large_order(folio); } =20 /** @@ -1100,7 +1105,7 @@ static inline unsigned int folio_order(const struct f= olio *folio) { if (!folio_test_large(folio)) return 0; - return folio->_flags_1 & 0xff; + return folio_large_order(folio); } =20 #include @@ -2035,7 +2040,7 @@ static inline long folio_nr_pages(const struct folio = *folio) #ifdef CONFIG_64BIT return folio->_folio_nr_pages; #else - return 1L << (folio->_flags_1 & 0xff); + return 1L << folio_large_order(folio); #endif } =20 @@ -2060,7 +2065,7 @@ static inline unsigned long compound_nr(struct page *= page) #ifdef CONFIG_64BIT return folio->_folio_nr_pages; #else - return 1L << (folio->_flags_1 & 0xff); + return 1L << folio_large_order(folio); #endif } =20 --=20 2.46.0