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 5392FC433FE for ; Thu, 10 Dec 2020 18:22:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 109BB23C44 for ; Thu, 10 Dec 2020 18:22:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393041AbgLJSVn (ORCPT ); Thu, 10 Dec 2020 13:21:43 -0500 Received: from aserp2130.oracle.com ([141.146.126.79]:48126 "EHLO aserp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403842AbgLJRFs (ORCPT ); Thu, 10 Dec 2020 12:05:48 -0500 Received: from pps.filterd (aserp2130.oracle.com [127.0.0.1]) by aserp2130.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 0BAGna0h139791; Thu, 10 Dec 2020 17:04:50 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=/347E1vujMDUPzB7sQHqI8ty+olG6ISzvqpCNopxQXY=; b=Tykuo2aZI4voYgssiwQ5PMXQd9r5PULM+odtjfo2xlA2JXcawSaRUL5SMzxUCqvu+JIT 2vm8EAkpb8ArRChbKuEa3g+QO7ARuLxbMZSJ7IQ6C1y2/REFj/RFrgSUCTAGh4txt86H 03pHo5jRkDtfINVT+0xKeg8N6oDUk2POAeZJxSOD0oUWPyz2Wc+BmdloM4TT//2LlzAU x5arPRVZA7DDtbcVrRlAUOByLgZjCYvYcGsXd5cA2LxveDU/FyhRi5FiTweel7h0/3Ly vhP3Wm3bvKv1ZVEgPxd4YATNDh2FtNwI15JlYnP5d+wsRhLGPm+QzpgKS/gY/iJZerPV EQ== Received: from aserp3030.oracle.com (aserp3030.oracle.com [141.146.126.71]) by aserp2130.oracle.com with ESMTP id 357yqc6m06-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 10 Dec 2020 17:04:50 +0000 Received: from pps.filterd (aserp3030.oracle.com [127.0.0.1]) by aserp3030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 0BAGvKXE162576; Thu, 10 Dec 2020 17:04:49 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserp3030.oracle.com with ESMTP id 358ksrr5d7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 10 Dec 2020 17:04:49 +0000 Received: from abhmp0009.oracle.com (abhmp0009.oracle.com [141.146.116.15]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 0BAH4nsM009036; Thu, 10 Dec 2020 17:04:49 GMT Received: from revolver.jebus.ca (/23.233.25.87) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 10 Dec 2020 09:04:48 -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 13/28] mm/gup: Expose mm_populate_vma() for use when the vma is known Date: Thu, 10 Dec 2020 12:03:47 -0500 Message-Id: <20201210170402.3468568-14-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 mlxlogscore=872 suspectscore=0 bulkscore=0 malwarescore=0 phishscore=0 mlxscore=0 spamscore=0 adultscore=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 mlxlogscore=887 clxscore=1015 malwarescore=0 bulkscore=0 phishscore=0 adultscore=0 spamscore=0 priorityscore=1501 mlxscore=0 lowpriorityscore=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 When a vma is known, avoid calling mm_populate to search for the vma to populate. Signed-off-by: Liam R. Howlett --- include/linux/mm.h | 4 ++++ mm/gup.c | 20 ++++++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index 1bfa2ee41187d..6cc8825f26414 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2587,8 +2587,12 @@ static inline void mm_populate(unsigned long addr, unsigned long len) /* Ignore errors */ (void) __mm_populate(addr, len, 1); } +extern void mm_populate_vma(struct vm_area_struct *vma, unsigned long start, + unsigned long end); #else static inline void mm_populate(unsigned long addr, unsigned long len) {} +void mm_populate_vma(struct vm_area_struct *vma, unsigned long start, + unsigned long end) {} #endif /* These take the mm semaphore themselves */ diff --git a/mm/gup.c b/mm/gup.c index 102877ed77a4b..522f8fd491ead 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -1431,6 +1431,26 @@ long populate_vma_page_range(struct vm_area_struct *vma, NULL, NULL, locked); } +/* + * mm_populate_vma() - Populate a single range in a single vma. + * @vma: The vma to populate. + * @start: The start address to populate + * @end: The end address to stop populating + * + * Note: Ignores errors. + */ +void mm_populate_vma(struct vm_area_struct *vma, unsigned long start, + unsigned long end) +{ + struct mm_struct *mm = current->mm; + int locked = 1; + + mmap_read_lock(mm); + populate_vma_page_range(vma, start, end, &locked); + if (locked) + mmap_read_unlock(mm); +} + /* * __mm_populate - populate and/or mlock pages within a range of address space. * -- 2.28.0