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Howlett" X-Patchwork-Id: 12013867 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 6AF00C433E0 for ; Tue, 12 Jan 2021 16:13:44 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 051462222B for ; Tue, 12 Jan 2021 16:13:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 051462222B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=Oracle.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 2EC8D8D00B6; Tue, 12 Jan 2021 11:13:30 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 24E168D00B2; Tue, 12 Jan 2021 11:13:30 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 11C6C8D00B6; Tue, 12 Jan 2021 11:13:30 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0238.hostedemail.com [216.40.44.238]) by kanga.kvack.org (Postfix) with ESMTP id E2F238D00B2 for ; Tue, 12 Jan 2021 11:13:29 -0500 (EST) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 17F863632 for ; Tue, 12 Jan 2021 16:13:29 +0000 (UTC) X-FDA: 77697618138.30.rock20_1110e9427516 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin30.hostedemail.com (Postfix) with ESMTP id DBB83180B3C85 for ; Tue, 12 Jan 2021 16:13:28 +0000 (UTC) X-HE-Tag: rock20_1110e9427516 X-Filterd-Recvd-Size: 5616 Received: from aserp2120.oracle.com (aserp2120.oracle.com [141.146.126.78]) by imf08.hostedemail.com (Postfix) with ESMTP for ; Tue, 12 Jan 2021 16:13:27 +0000 (UTC) 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 10CG9vL6142092; Tue, 12 Jan 2021 16:13:18 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=YsorAUClrkEHgOJBLUL/TyvuzbM5YDyx1ZYDISzNn40=; b=OMCG7OuuCXQzmIsnJyJxB5R23lu6ABxtH9oyG/RZ2g0g2Kfb9nIGLe5sTJqbQA2yw9gB 2zgBl8H9w7/wbsVthjpZRTauZCvM7PsnDMk6xZyBWPG3k4Ehltmkja3Dtq9qPQtmgV7l 5NyqIh6hX7Ny/+ocmyvn+tz3Tc2/hX7r4HWVBcnMLIyKhJL5hHulal4oLa2TdMsdGAio v1TGkCWO1z2ugXuB9MQN1VQNiRyTjUZGH1MWJeGnN8cbjngPq2pHArXBZdyT/BAVUDb+ dd4MP+waz++rpDcTMXrxrplg0ezwrwACbruKUBH01WoBDCgnZaYCNogH8hLmiHSzS+Mg og== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by aserp2120.oracle.com with ESMTP id 360kcyq5ch-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 12 Jan 2021 16:13:17 +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 10CGAWwo161712; Tue, 12 Jan 2021 16:13:17 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userp3020.oracle.com with ESMTP id 360kf5q3uj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 12 Jan 2021 16:13:17 +0000 Received: from abhmp0012.oracle.com (abhmp0012.oracle.com [141.146.116.18]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 10CGDFlY004266; Tue, 12 Jan 2021 16:13:15 GMT Received: from revolver.jebus.ca (/23.233.25.87) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 12 Jan 2021 08:13:15 -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 , Rik van Riel , Peter Zijlstra Subject: [PATCH v2 13/70] mm/gup: Add mm_populate_vma() for use when the vma is known Date: Tue, 12 Jan 2021 11:11:43 -0500 Message-Id: <20210112161240.2024684-14-Liam.Howlett@Oracle.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210112161240.2024684-1-Liam.Howlett@Oracle.com> References: <20210112161240.2024684-1-Liam.Howlett@Oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9862 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 mlxlogscore=958 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101120092 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9862 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 phishscore=0 impostorscore=0 bulkscore=0 adultscore=0 suspectscore=0 malwarescore=0 lowpriorityscore=0 clxscore=1015 mlxlogscore=967 mlxscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101120092 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: 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 dbb83118eba09..baaad07c43c99 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 98eb8e6d2609c..b06e2a6d90187 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. *