From patchwork Fri Jul 5 16:24:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 13725364 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) (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 A24C9225AE; Fri, 5 Jul 2024 16:25:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=205.220.177.32 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720196724; cv=fail; b=JDkEfZCk769nOoZ6q+DGdOB0HGeZ0rJ5rRh3UqXtkMl5AEjKxT7p7nE3wheFavWuo88lKclkCW6BjNs4n6t1zr4xcQxpKTOnBW3RVK0cFArFcoUMwmxKi9Ep+/BbKNj9F958VOpClXhJJnkHITic0Nhtd1VERFVfYCRBJRIE6co= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720196724; c=relaxed/simple; bh=bDIhO7cn3QNHi4OV3H+bBhu6VpbcNqgujdsIUIm7cVc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: Content-Type:MIME-Version; b=V2RxgloOaYEbfi9sb466qHROzljoc+Nm9seBHNFvq1L4SQ0h/L91SS6lEfiarw3wdTLg3P2m9eWwZPiiMSqYPL7yvNt15xHxcHFOCnoNDhDinhduNTs4uABbd2t6/SnUOOw87ELQe7XybpFms0GmYPjSHpyIw5Wc9nQdSydaP/s= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oracle.com; spf=pass smtp.mailfrom=oracle.com; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b=QL4BG4QW; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b=Oi0VHNND; arc=fail smtp.client-ip=205.220.177.32 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oracle.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oracle.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="QL4BG4QW"; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b="Oi0VHNND" Received: from pps.filterd (m0246631.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 465GMURg008277; Fri, 5 Jul 2024 16:25:14 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 :content-transfer-encoding:content-type:mime-version; s= corp-2023-11-20; bh=N/VNfmzzzpq9WiOvw8jG5FmH9pc5+ps66GdlNYpQkjE=; b= QL4BG4QWv0Ojpt9rvwSYN1IZRl4j6KGQ/uH3QNjSy4Xr9yr7nXGuynCj3eemzpj9 C1rahphYu2qQ/DIw6yezsoHoyboUzOr8qyLpVkVE1vRS3DDCu5sVCjqfuRMsTWDf 5BL6JNIjmUmy2Ww0/ka5O55/loiNdV4enTQI9X67YllJ7PigJIQGl1GiIeCbthtH 5L4am0xOoQrhQmOQ4RQAQqI7twfgCP0d9Tz4wqrhCVY9fVhh4KlcmmAjVwYp11TH 0PLGkHXme+9zfGlOIsM1E5+uAEL63PKDgjrmRlrFoQn8nmpsM7WvCaIC3ioBZsLJ CTTkFave9wTWgmg8P6ZfKA== Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.appoci.oracle.com [147.154.18.20]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 40292347ky-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 05 Jul 2024 16:25:13 +0000 (GMT) Received: from pps.filterd (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 465GITIn010337; Fri, 5 Jul 2024 16:25:13 GMT Received: from nam11-bn8-obe.outbound.protection.outlook.com (mail-bn8nam11lp2169.outbound.protection.outlook.com [104.47.58.169]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 4028qhwsnu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 05 Jul 2024 16:25:13 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=mcdBoF8P/D9HaV0ss6nG4nvJAUB6O6qBPcJC5o2jVnRv/LJEb7yJnrYOnF6vzvxIaKLSLo/Cc0e4boLDu5R00hsX/wEPFxNFi6QxoEN/MiouHCkn6Dni8ZwiotBzPZR2yClkLePZnP8SpzIF0VGGWH/QzgQptsxeIkPe5LI7ql9rFl/rtkd6Gt9k7BpNRkV+KJF6koCXOgqwt1MUySVYIBTyDKhOAtRxiDE4w3wMS3gd0qfmp+5bvCYKvorPZRtvEaNmW5Zi8lynQbUc5SbaJRC6nrBMkmWEZz77VlQrOOnU++4gywd+fYm0RFQmlP33j/4ScJ5n4Qzw15X+Ecw2IQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=N/VNfmzzzpq9WiOvw8jG5FmH9pc5+ps66GdlNYpQkjE=; b=E0/ukTSSAyOVxv/LzY/hmXBhXMQGf5RRAfYN650G0zAJAJbqtuU+0lJiGrMa96qhdedlJX90OvJPScWfX7ca5E9WQ0NK6Md0tJrnSnk1Ju9W61nvATBOVrfgtidWED8JGM4+89r125JbNSiLrxhXVvzLcEJwy1TUDQyyeARRiohhHznp61mIZadZVXI6HCFjUdGw541sKTS9Vdo2g0boBRa915sWMPJ2XYZgNT8Rk907o47jDGfBWzp3beiDrXhTO4YzapeJeFXdu0rTRpqKBqx36MoUTU2qXtdX1R7AsaeJloS9N2WtOFgy+BEEnXq3SdoE1vKJq+OnwCYhWUVL0w== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oracle.com; dmarc=pass action=none header.from=oracle.com; dkim=pass header.d=oracle.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.onmicrosoft.com; s=selector2-oracle-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=N/VNfmzzzpq9WiOvw8jG5FmH9pc5+ps66GdlNYpQkjE=; b=Oi0VHNNDRo3k81Cu4lalxzkxpgI65FNMy8IeJBUqKo0NaX0PQW8GjkLvktmTCdFRUZooMTwa4yMlNEqXDRUx0xyJZTXj+m2wSqE2kD1cU9Vdx3ostTrfpQMikSeaiHRyQvfT07d2I5Vn377pWkmcC9Ec3Bw6CHRvgccSpyQoFZw= Received: from DM6PR10MB4313.namprd10.prod.outlook.com (2603:10b6:5:212::20) by DS0PR10MB7361.namprd10.prod.outlook.com (2603:10b6:8:f8::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7741.30; Fri, 5 Jul 2024 16:25:11 +0000 Received: from DM6PR10MB4313.namprd10.prod.outlook.com ([fe80::4f45:f4ab:121:e088]) by DM6PR10MB4313.namprd10.prod.outlook.com ([fe80::4f45:f4ab:121:e088%6]) with mapi id 15.20.7741.025; Fri, 5 Jul 2024 16:25:11 +0000 From: John Garry To: chandan.babu@oracle.com, djwong@kernel.org, dchinner@redhat.com, hch@lst.de Cc: viro@zeniv.linux.org.uk, brauner@kernel.org, jack@suse.cz, linux-xfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, catherine.hoang@oracle.com, martin.petersen@oracle.com, John Garry Subject: [PATCH v2 02/13] xfs: always tail align maxlen allocations Date: Fri, 5 Jul 2024 16:24:39 +0000 Message-Id: <20240705162450.3481169-3-john.g.garry@oracle.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20240705162450.3481169-1-john.g.garry@oracle.com> References: <20240705162450.3481169-1-john.g.garry@oracle.com> X-ClientProxiedBy: BL0PR1501CA0010.namprd15.prod.outlook.com (2603:10b6:207:17::23) To DM6PR10MB4313.namprd10.prod.outlook.com (2603:10b6:5:212::20) Precedence: bulk X-Mailing-List: linux-xfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6PR10MB4313:EE_|DS0PR10MB7361:EE_ X-MS-Office365-Filtering-Correlation-Id: f27ba29e-4b1b-4635-d71f-08dc9d0f0aed X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DM6PR10MB4313.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(1800799024)(376014);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 4+r2vEQLD8puxyWQ+mJ+KXgHalBhxV9+twldLvwmNtHPMSa76yLZCpuQgozVyjFrCfek8S/2xt5pKPphzYn8YHdA2Mt1RD5khBqn4XCNfETSbEpTqDSm0kGovBwWjm+9UZMCeLs0zv0MjPxU/ytoctSpdniL5WVbfloXOwbzUBoPozuKPNHdy6fYKQeP6t2Xjlh4fNPnFljlQ65yJVzFTLEyKiuAHx8dG0fYnItZdvsaqcQbtT9UM+x//OyWPQyvGEm9+BAznJdO+YLzK2GjSikcPau27zRY7VRSAtmUqtn0uLEVe6R/Gsq9b/jLvLb3O869rJtEX8PXcOhJdPgxM9+BSHJ9DnRrMGka29txfdXkJCtAmGqG+ReqS34qMb4luXELH8Cj05Gw9WBrxJYJrcZNw2yeUrQWxrmmuAqy6EN0HHQMCupb+VE7pjV+kadY12GwJnKXdzV1tB5Ac9a/EMl3vOThZYdPPSzp2kTLwFqLYeaB8UJRQDgwd4X+KOuPxHKm28LTgizFwSvO3QtFo/cpTE2t717M1RIXt6R9W/6IcP/ugeiYSLDoTeTV3GcGYrQrqBXCzT+x8PHMmhKC8BDxTsQOUTmHFCwDB9UN4scssF5cZx0riMbxz6lP5AP3180dkyNwfzBVR0W+W9R0X3kM1CS3OZtLWxWRWtZlE1JDB1moBFt4igt2nY+PSyyi2+FRXOVYUCuESQTor9yo51uYQVt7o5Lg0TTrBve4+5IemnerpS1nsffVGQZ8QmtUNdpiK8lzxkItYDXSmGJwbybTqmo3LJBEIAxmecXJrG/Qjhe6/UAb2+EQyzIv5LJpjjwonCzmepFyV32NtiJboKAKlIuHvOIRDOfw8VRGLNbLOxeBBPhWE24Rg65UvOSA5OFgqpD4gq0oqxPMaVZmFdFHNEBP01Ljnp/6cxs63dhT4o7z41yfSTwRArumDvhlZYMzenapcJ+MC+hef3e0/c1r1aOfPWLHopfbpUQz0lsxlXM4EZo1Yl+ivY6hOR073JooN5GrENETh9/+nQlT+9Yj3bmpLNbLiqv91I9ElhIljt0/oruRXusM8uAfc8e0IcVfMImIcBjfA50O1QfdrG8X3rQV/1ps9yG3IWcFue60Dr2g9p8W3Y0nfZWlgs418yC6mlhsiI6dv8hbIn7/klqSmAFiFoR7ybsSwU5LZ6X+FnKSmiQReV9p+71YK1W+8/NP0PH8EnVK7eB9J2PJ3CaZyWTVnvMVi7sszRNOVwTfEei8DzzOk5B0OMykXlSj1HKm9okBQds9SzxLxfuqYePy6tJz1xwZgcym5ALjnYYIXD7NSIsBMRj6nZUdlRx6BVaFGckVMAuBVtiFKXjkG8TxB5UV8nuCN5WlIyU9GCsV1ex86aO9sQb0HtUos3b1mcMc2DehEd4lD55KeIEhLltApkifykhAaQhPndUJqfkMBKIWdN1K849883EIqrd/wAL0lp+UUP499US0wafOXbg3PQQve7afplmXTuvpiC/ewh6q0UbJt1SKHXoiZKbYixgXCMZEKRi/pdBPsJGh1gMR7183ARhzxzz6GNX8XekRsPMiP2h4cpLRkArev8lo/n0Srhkx7BXnJpupAFYxPg== X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: 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 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: f27ba29e-4b1b-4635-d71f-08dc9d0f0aed X-MS-Exchange-CrossTenant-AuthSource: DM6PR10MB4313.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Jul 2024 16:25:11.4140 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: RgG0vYmvFKNuX/52vTnxpO69TQmHwSTwkhc+gI6VI120eExgbYZTSzpIMKRB+pInvpXRjbs90M6hFqSCXZJbQA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR10MB7361 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-05_12,2024-07-05_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 adultscore=0 bulkscore=0 mlxlogscore=999 phishscore=0 spamscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2406180000 definitions=main-2407050119 X-Proofpoint-GUID: YcV5rCAk8JOL0SLA26KsXeJaj-oYmDoL X-Proofpoint-ORIG-GUID: YcV5rCAk8JOL0SLA26KsXeJaj-oYmDoL From: Dave Chinner When we do a large allocation, the core free space allocation code assumes that args->maxlen is aligned to args->prod/args->mod. hence if we get a maximum sized extent allocated, it does not do tail alignment of the extent. However, this assumes that nothing modifies args->maxlen between the original allocation context setup and trimming the selected free space extent to size. This assumption has recently been found to be invalid - xfs_alloc_space_available() modifies args->maxlen in low space situations - and there may be more situations we haven't yet found like this. Force aligned allocation introduces the requirement that extents are correctly tail aligned, resulting in this occasional latent alignment failure to be reclassified from an unimportant curiousity to a must-fix bug. Removing the assumption about args->maxlen allocations always being tail aligned is trivial, and should not impact anything because args->maxlen for inodes with extent size hints configured are already aligned. Hence all this change does it avoid weird corner cases that would have resulted in unaligned extent sizes by always trimming the extent down to an aligned size. Signed-off-by: Dave Chinner Reviewed-by: "Darrick J. Wong" [provisional on v1 series comment] Signed-off-by: John Garry --- fs/xfs/libxfs/xfs_alloc.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index 74f0a3656458..2864520c3902 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -432,20 +432,18 @@ xfs_alloc_compute_diff( * Fix up the length, based on mod and prod. * len should be k * prod + mod for some k. * If len is too small it is returned unchanged. - * If len hits maxlen it is left alone. */ -STATIC void +static void xfs_alloc_fix_len( - xfs_alloc_arg_t *args) /* allocation argument structure */ + struct xfs_alloc_arg *args) { - xfs_extlen_t k; - xfs_extlen_t rlen; + xfs_extlen_t k; + xfs_extlen_t rlen = args->len; ASSERT(args->mod < args->prod); - rlen = args->len; ASSERT(rlen >= args->minlen); ASSERT(rlen <= args->maxlen); - if (args->prod <= 1 || rlen < args->mod || rlen == args->maxlen || + if (args->prod <= 1 || rlen < args->mod || (args->mod == 0 && rlen < args->prod)) return; k = rlen % args->prod;