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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY 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 17AD5C43331 for ; Fri, 6 Sep 2019 03:39:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 123D6206B8 for ; Fri, 6 Sep 2019 03:39:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="mj0p1k6V" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387776AbfIFDjn (ORCPT ); Thu, 5 Sep 2019 23:39:43 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:38680 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726940AbfIFDjn (ORCPT ); Thu, 5 Sep 2019 23:39:43 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x863dIJb108594; Fri, 6 Sep 2019 03:39:41 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : from : to : cc : date : message-id : in-reply-to : references : mime-version : content-type : content-transfer-encoding; s=corp-2019-08-05; bh=4h3OQuBn8pRUP0g/Wi+oBN7oH8p3EQKoSQamm3fBr9w=; b=mj0p1k6V0qRziDZtunCSqx38YGABmHYoRIqi8pTrM8Sw9pQN/doCgYc3feOaB0hYqDx6 4YuaBesdbzaiBqoZKgJbFt+aRDrBLdAcu7b9yZJgA4H7fN64Vw3hZnbACSSs4iJPN1Zb 0jZ0y076ZyWvDs/G7dQ7xxB5raaMNqqBcqztcz/Y6O0MGe6TnBbAy/rLw4qSUuz8xham gvR3Ov7hNtreNOkES/poFfb7zIz98hjXuSq0hM4BE73u4uT9cF1HfNJTANkeM4VBNjr+ CnHZgdIbaWdzfWmGy6QoX1CiCDcSw2saRyxj0WC3FBOvrXZgslUhGDSJGIPU3tj9H7PD iw== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by userp2120.oracle.com with ESMTP id 2uuf5f83ae-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 06 Sep 2019 03:39:40 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x863dGaA112714; Fri, 6 Sep 2019 03:39:40 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserp3020.oracle.com with ESMTP id 2uud7p2su8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 06 Sep 2019 03:39:40 +0000 Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x863ddm3006329; Fri, 6 Sep 2019 03:39:39 GMT Received: from localhost (/10.159.148.70) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 05 Sep 2019 20:39:39 -0700 Subject: [PATCH 07/11] xfs_scrub: request fewer bmaps when we can From: "Darrick J. Wong" To: sandeen@sandeen.net, darrick.wong@oracle.com Cc: linux-xfs@vger.kernel.org Date: Thu, 05 Sep 2019 20:39:39 -0700 Message-ID: <156774117912.2645432.10361703081233421846.stgit@magnolia> In-Reply-To: <156774113533.2645432.14942831726168941966.stgit@magnolia> References: <156774113533.2645432.14942831726168941966.stgit@magnolia> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9371 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1909060040 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9371 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1909060040 Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org From: Darrick J. Wong In xfs_iterate_filemaps, we query the number of bmaps for a given file that we're going to iterate, so feed that information to bmap so that the kernel won't waste time allocating in-kernel memory unnecessarily. Signed-off-by: Darrick J. Wong --- scrub/filemap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scrub/filemap.c b/scrub/filemap.c index bdc6d8f9..aaaa0521 100644 --- a/scrub/filemap.c +++ b/scrub/filemap.c @@ -71,7 +71,6 @@ xfs_iterate_filemaps( map->bmv_length = ULLONG_MAX; else map->bmv_length = BTOBB(key->bm_length); - map->bmv_count = BMAP_NR; map->bmv_iflags = BMV_IF_NO_DMAPI_READ | BMV_IF_PREALLOC | BMV_IF_NO_HOLES; switch (whichfork) { @@ -96,6 +95,7 @@ xfs_iterate_filemaps( moveon = false; goto out; } + map->bmv_count = min(fsx.fsx_nextents + 2, BMAP_NR); while ((error = ioctl(fd, XFS_IOC_GETBMAPX, map)) == 0) { for (i = 0, p = &map[i + 1]; i < map->bmv_entries; i++, p++) {