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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,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 7844BC0018C for ; Thu, 10 Dec 2020 18:09:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1DC7F23D57 for ; Thu, 10 Dec 2020 18:09:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404014AbgLJRIB (ORCPT ); Thu, 10 Dec 2020 12:08:01 -0500 Received: from aserp2120.oracle.com ([141.146.126.78]:37796 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403960AbgLJRHn (ORCPT ); Thu, 10 Dec 2020 12:07:43 -0500 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 0BAGnOUV044314; Thu, 10 Dec 2020 17:06:45 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=corp-2020-01-29; bh=BYmybpgJJ4d55f5GNwUB/pYERLG+Xai0zCFVglgkl08=; b=R1FzNWTv8CI9u3QS7OV6Zg60kNcdjvy7dNnxCzl1gKJSFH7EzIOc/p9SczoYFt0aRLdl 9btzUHemBCyKCk6s0HE0A4Wg/mKit+hSJ/D5ZF9Z35LHZLi2ZDne5Wwfl54YYnX3dBXq rmlWH+D+k9FPlIvFRSTyGqrmFL86Msd5MWoPH/bA/G6Q5zqLUpSVQkVdejht0Nr4Kyc9 S91Lk4TR7p83pPqis61KwxfR1SOyLuwGsskymfzGVdrQo6ZaDkPsnimKq7PqpQcevhYV b8yE3MhBc/RtRbM93ggmbjUQzrKkJEqGTovhM8qz38ItmGAQUOKFK+grQIE3cAo6NFki 5w== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by aserp2120.oracle.com with ESMTP id 35825mehfs-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 10 Dec 2020 17:06:45 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 0BAGwvvk080537; Thu, 10 Dec 2020 17:04:44 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userp3020.oracle.com with ESMTP id 358kywm345-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 10 Dec 2020 17:04:44 +0000 Received: from abhmp0009.oracle.com (abhmp0009.oracle.com [141.146.116.15]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 0BAH4gEB012705; Thu, 10 Dec 2020 17:04:42 GMT Received: from revolver.jebus.ca (/23.233.25.87) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 10 Dec 2020 09:04:42 -0800 From: "Liam R. Howlett" To: maple-tree@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Andrew Morton , Song Liu , Davidlohr Bueso , "Paul E . McKenney" , Matthew Wilcox , Jerome Glisse , David Rientjes , Axel Rasmussen , Suren Baghdasaryan , Vlastimil Babka Subject: [PATCH 08/28] mm/mmap: Change find_vma() to use the maple tree Date: Thu, 10 Dec 2020 12:03:42 -0500 Message-Id: <20201210170402.3468568-9-Liam.Howlett@Oracle.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201210170402.3468568-1-Liam.Howlett@Oracle.com> References: <20201210170402.3468568-1-Liam.Howlett@Oracle.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9830 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 spamscore=0 mlxscore=0 malwarescore=0 suspectscore=0 mlxlogscore=999 bulkscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012100106 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9830 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 adultscore=0 bulkscore=0 phishscore=0 mlxlogscore=999 clxscore=1015 priorityscore=1501 mlxscore=0 spamscore=0 lowpriorityscore=0 malwarescore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012100106 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Start using the maple tree to find VMA entries in an mm_struct. Signed-off-by: Liam R. Howlett --- mm/mmap.c | 29 +++++++++++------------------ 1 file changed, 11 insertions(+), 18 deletions(-) diff --git a/mm/mmap.c b/mm/mmap.c index 6999c2bcf0496..53876d66a27ea 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2484,10 +2484,17 @@ get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, EXPORT_SYMBOL(get_unmapped_area); -/* Look up the first VMA which satisfies addr < vm_end, NULL if none. */ +/** + * find_vma() - Find the VMA for a given address, or the next vma. May return + * NULL in the case of no vma at addr or above + * @mm The mm_struct to check + * @addr: The address + * + * Returns: The VMA assoicated with addr, or the next vma. + * May return NULL in the case of no vma at addr or above. + */ struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr) { - struct rb_node *rb_node; struct vm_area_struct *vma; /* Check the cache first. */ @@ -2495,24 +2502,10 @@ struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr) if (likely(vma)) return vma; - rb_node = mm->mm_rb.rb_node; - - while (rb_node) { - struct vm_area_struct *tmp; - - tmp = rb_entry(rb_node, struct vm_area_struct, vm_rb); - - if (tmp->vm_end > addr) { - vma = tmp; - if (tmp->vm_start <= addr) - break; - rb_node = rb_node->rb_left; - } else - rb_node = rb_node->rb_right; - } - + vma = mt_find(&mm->mm_mt, &addr, ULONG_MAX); if (vma) vmacache_update(addr, vma); + return vma; } EXPORT_SYMBOL(find_vma); -- 2.28.0