From patchwork Fri Nov 22 01:40:25 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alistair Popple X-Patchwork-Id: 13882611 Received: from NAM12-DM6-obe.outbound.protection.outlook.com (mail-dm6nam12on2064.outbound.protection.outlook.com [40.107.243.64]) (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 2BEC4166302 for ; Fri, 22 Nov 2024 01:41:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.243.64 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732239691; cv=fail; b=WhsTozfyVW7Svrb1ZW9hjKqV7f1W1vnwVrIUfVC6lsk7ppKqctCLoOPa8z+QnZ3rCSHk6hXiduamF+kfMiBP4Eon2Ph8ioewSJ6TCgmLTUu6uLxjZrQ74hsB2deyarggfyhRUTO5rU1OXc2Uu3VLxs/qjF9ovDPK7ulPYR1HIkw= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732239691; c=relaxed/simple; bh=cq48zLtdILuZsOSnvH3Hi+btvp1Cy3JooyYQkUZ5q1w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=RIJvK3FhqwB/VC95xyA6ogtZkAUsgDdpS8gaujD7GfqY5c7iPFEV4jiSsTd8Mk2izWYwMeC0XzVC0AxjeOY51cY3iEcNLynkMOtZcGWc8Drt0q8DoqQY+rprfJ/vp+XNfNfkr0kzwzNKRTSxmqgJ5b6AtnJ/jx/i+QBv5atQauQ= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com; spf=fail smtp.mailfrom=nvidia.com; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b=FPWWbZop; arc=fail smtp.client-ip=40.107.243.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=nvidia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b="FPWWbZop" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=EjPzjwPVG+RkdHotwXs+rk+UvSi6cCWH7Py+ovslYDesIKGnjDGsdGiRfFV3lei3u6q5mmU7++7mtV4dhz9+qZsXoRqs77e4+DKXLEqGHwwoO2AejTlJJswDakMpyuUuq5AAHg+/7R5PMCwyLGx3+W6CsNzOHmqXbqATWx3ADXO1SN1TccUCA7mAhkFo2In6PGN11mrat4jz8qtuGgTgogWImkLcWXPS6e6zZPeZ4toGwShp3D9xhreqi/7XarPx2iYmjxkAkn9j59oH8/FAwnsFenb5x/sgXsYUAUrafO4Py1nh/ps3UpZPjFwIjrlswWLwZ/kUDXLQKv5NhtdAOA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; 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=41LuzWbsulYp/PRvvGucQX4mO89Nz3ZyduYN8QkpUTM=; b=FYBM7dYVa5ntezYAa2T4U9/vCpzhefD5lRr8AYFDiEybbScdj94AebJ0Bd2gjO3qrxqbm0lpxr6MlDLj/cIPLodI285anPfkL1mAps62QmaYelIecxIXAseWkFwXedU529xDlTqQOpfNdDE38v8Tw1dr6CbD3A8UlTYQ/bLUr4jFZELlksvfTTzHY2vQVmEsS/mmQr6UCyN6p4p5uHnuujdGVfGdogLjbjLnhw/eXHtRDz3WuVeE3VpNzLfwlkwdv0y4Uwf5avpwUt0K8pIGOhLdLAIieWDYNjVH73bkA+2mGxXR+D2l6j3ITHZ1gA6OBclVslpC5sszQqRIIawwZg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=41LuzWbsulYp/PRvvGucQX4mO89Nz3ZyduYN8QkpUTM=; b=FPWWbZopysFhz6vWMmcnRjBsqRUKZP1kRo4DEu4Bq+bTI2/lrB0fvi2har2/b2tDgzBlXCPToCioKWG9JUYAfYiv+zEKOPiABqCXvx5lrl/KBIyvbnrhrDfbF0gJ/w2BdQcSDT3Sxb2QKaoPHlRBfXxVvHv+px0X8akqyG8EN/mkWyyNKrpP0XdZORj+JwbvWSL80Jr3eVAhOKanFOln+GdUv2DNi1G2JgrNEzd9Dg7r1onrEudPV5vcJa7Nd8LMeqefFQBvLgMQkcy0RMomzUGXPBUuL785P2CP6IzwBj5nrN8DqhOA7G1VOgovum29I7c4uJVGiEAvRuLLSjDl4g== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from DS0PR12MB7726.namprd12.prod.outlook.com (2603:10b6:8:130::6) by IA1PR12MB6305.namprd12.prod.outlook.com (2603:10b6:208:3e7::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8182.17; Fri, 22 Nov 2024 01:41:27 +0000 Received: from DS0PR12MB7726.namprd12.prod.outlook.com ([fe80::953f:2f80:90c5:67fe]) by DS0PR12MB7726.namprd12.prod.outlook.com ([fe80::953f:2f80:90c5:67fe%4]) with mapi id 15.20.8182.016; Fri, 22 Nov 2024 01:41:27 +0000 From: Alistair Popple To: dan.j.williams@intel.com, linux-mm@kvack.org Cc: Alistair Popple , lina@asahilina.net, zhang.lyra@gmail.com, gerald.schaefer@linux.ibm.com, vishal.l.verma@intel.com, dave.jiang@intel.com, logang@deltatee.com, bhelgaas@google.com, jack@suse.cz, jgg@ziepe.ca, catalin.marinas@arm.com, will@kernel.org, mpe@ellerman.id.au, npiggin@gmail.com, dave.hansen@linux.intel.com, ira.weiny@intel.com, willy@infradead.org, djwong@kernel.org, tytso@mit.edu, linmiaohe@huawei.com, david@redhat.com, peterx@redhat.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, nvdimm@lists.linux.dev, linux-cxl@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, jhubbard@nvidia.com, hch@lst.de, david@fromorbit.com Subject: [PATCH v3 04/25] fs/dax: Refactor wait for dax idle page Date: Fri, 22 Nov 2024 12:40:25 +1100 Message-ID: X-Mailer: git-send-email 2.45.2 In-Reply-To: References: X-ClientProxiedBy: SY5PR01CA0119.ausprd01.prod.outlook.com (2603:10c6:10:246::15) To CY8PR12MB7705.namprd12.prod.outlook.com (2603:10b6:930:84::9) Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS0PR12MB7726:EE_|IA1PR12MB6305:EE_ X-MS-Office365-Filtering-Correlation-Id: b89cb45e-9681-4324-9a99-08dd0a96c7d6 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|7416014|376014|7053199007; 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:DS0PR12MB7726.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(366016)(7416014)(376014)(7053199007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: LrcS7mIOCApa64fh6J/d+9KUHo2OE/MqUVwi4Afgpuz5ZyH0XJGnQxC2u+ATcOBplEqH4Qp4vkX7RqDxQ/qEH9EsOrnlCTYaY4725TAHNFd94ROkc2G88oQ3Q2dYl8XG/upiW40Wt4SfJKeedWXvd+pfUUybJ3FIL2RUXC0kkFb01+Bq5ILlzdSdKn4Czbl4vmEUhPYWC/62L/W5F4Lv+h6Y+uk1LmJNles7c8HUDnJtbYryWTBq+NS7YhtTtPZHtBtG4KuOfhdbx5NWORm4x5O+O10EVifzaD7C4MYTUWCkodetZyF84gdJ6GMFUqyVeRQN5S9+Ty1wO2N+zZ3WWWwr28J+Y5CBPvUH4e2YYNNNRPPiCgfQnA2mswg06JUhLYULwNs8+7FoJSAER9k5fE6K+5EUghMINSCuzjrUsACtOc5PpkxfZaPdCKhgSN2gAnOzF++iL2wCmvLnyLuZflnzS8iIMaYdvzo2q5BligJYZJ383Jrzroqwqw4UBoVfQFSD1o6Vz95kPbiPcccgRRcdo0K/nKapVfAgnolFgcrwqrjO0RYWx8V9EneqrvUpkDw+NvCdIg9DfARtDnGwQV7StwOTQWH2hEMpdZW1/XWlGbXFajbaEWgFuv6elF2ssUgSbAaWODcHN/eYGH4IZ81ThZRxLfW2hC1y0eDxcA9/g66NPsfY1KGkvDCF7KOxja3k1Q2HH++497D+YJLZ6U2aEE2CF5EJUw2h7lwV3bfOP4A2aplLSm2Mj/IDQTclhG3jbD8IZDFHyaoZkFQRhQWov1ofUGHROOitd/8Fszgb97dWFctcof3SjxIcVvoR93BR/EbYPQKQe8xWLTogt3Vonblrup7W9yYcBXkYSNIKrgIqkR2NCVlV8F1oENamhllR1J1JEaBD9dYnMhIKny3VxGgcxDFwjFm2QFiy1UVf3uOiwxIOIzHOSZFNwnwqdlEKF/fPQD/7NsHYEkdxapUygtVJiLam9w/ArSW/WqlCggmfM/SU4+Q+YKly1KkwAuymnXS2h4r3ecSp4rdRXz07aLmJdTIaVbB32Xsc0aRbZQMIZLjnhp5nYcIO772cVDduxVlCjM4GYru9ACRbGaDGE3EtwbBLnvZmxL67fHdgEGJdLpKTO2yQjUFeKNF2YMRcTo1G6aKl6GNFAIDj1SMGDZ87lNfC/Q4bxXTf4gpFeUt3iotxv/gs6Gx3MYsSVK1bNpvjbYvtoZj+wmOoiCbq/KlrYX1VpMSej7H0ql3OHlU5QJRyBJs0oUz1KX9gImoUsyvS4mRBqsu4EmeIer8D9/tEklbnWpjid7kvivTx6NddrE7iZBmprBx9/t2wAB75Epgd69L95psVzPPm2BCN4wskuy3GKLk8GOGlmGEnLcYgjg8psuMeFuTxNPLDJ/wP/1NHkRCpAZlCeZ50ro6bJZ2Lu5P1kdKylsoYd9XE34jKuGydxjmsl4zArSeE8V/cqO1M3E06WNSbiji8TDjwuxxVLY7cDC1QLTtwsP5WmwnVZLJUVrOas9dyBOg1r8jpm7XyGEangCOA4iJQLT5t1zShkCitvlin/reSy62UaYyrwrxeNRguTSXkERbT X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: b89cb45e-9681-4324-9a99-08dd0a96c7d6 X-MS-Exchange-CrossTenant-AuthSource: CY8PR12MB7705.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Nov 2024 01:41:27.5129 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: CI5cCDec1pLcjWyBDZawH7QH6iwOF1Iqcgj7aBlDi0whYUccbeQeit737RuRreXXEWIJybBhLxPts8yEyACfzg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB6305 A FS DAX page is considered idle when its refcount drops to one. This is currently open-coded in all file systems supporting FS DAX. Move the idle detection to a common function to make future changes easier. Signed-off-by: Alistair Popple Reviewed-by: Jan Kara Reviewed-by: Christoph Hellwig Reviewed-by: Dan Williams Acked-by: Theodore Ts'o --- fs/ext4/inode.c | 5 +---- fs/fuse/dax.c | 4 +--- fs/xfs/xfs_inode.c | 4 +--- include/linux/dax.h | 8 ++++++++ 4 files changed, 11 insertions(+), 10 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 54bdd48..cf87c5b 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3890,10 +3890,7 @@ int ext4_break_layouts(struct inode *inode) if (!page) return 0; - error = ___wait_var_event(&page->_refcount, - atomic_read(&page->_refcount) == 1, - TASK_INTERRUPTIBLE, 0, 0, - ext4_wait_dax_page(inode)); + error = dax_wait_page_idle(page, ext4_wait_dax_page, inode); } while (error == 0); return error; diff --git a/fs/fuse/dax.c b/fs/fuse/dax.c index 501a097..af436b5 100644 --- a/fs/fuse/dax.c +++ b/fs/fuse/dax.c @@ -676,9 +676,7 @@ static int __fuse_dax_break_layouts(struct inode *inode, bool *retry, return 0; *retry = true; - return ___wait_var_event(&page->_refcount, - atomic_read(&page->_refcount) == 1, TASK_INTERRUPTIBLE, - 0, 0, fuse_wait_dax_page(inode)); + return dax_wait_page_idle(page, fuse_wait_dax_page, inode); } /* dmap_end == 0 leads to unmapping of whole file */ diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index bcc277f..eb12123 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -2989,9 +2989,7 @@ xfs_break_dax_layouts( return 0; *retry = true; - return ___wait_var_event(&page->_refcount, - atomic_read(&page->_refcount) == 1, TASK_INTERRUPTIBLE, - 0, 0, xfs_wait_dax_page(inode)); + return dax_wait_page_idle(page, xfs_wait_dax_page, inode); } int diff --git a/include/linux/dax.h b/include/linux/dax.h index 9d3e332..773dfc4 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -213,6 +213,14 @@ int dax_zero_range(struct inode *inode, loff_t pos, loff_t len, bool *did_zero, int dax_truncate_page(struct inode *inode, loff_t pos, bool *did_zero, const struct iomap_ops *ops); +static inline int dax_wait_page_idle(struct page *page, + void (cb)(struct inode *), + struct inode *inode) +{ + return ___wait_var_event(page, page_ref_count(page) == 1, + TASK_INTERRUPTIBLE, 0, 0, cb(inode)); +} + #if IS_ENABLED(CONFIG_DAX) int dax_read_lock(void); void dax_read_unlock(int id);