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Wed, 17 Apr 2019 17:53:48 +0000 (GMT) Received: from epcas2p1.samsung.com ( [182.195.41.53]) by epsmges2p1.samsung.com (Symantec Messaging Gateway) with SMTP id AC.A3.04195.C2867BC5; Thu, 18 Apr 2019 02:53:48 +0900 (KST) Received: from epsmgms2p2new.samsung.com (unknown [182.195.42.143]) by epcas2p4.samsung.com (KnoxPortal) with ESMTP id 20190417175347epcas2p41e4240ab83b46c9f07d237fc9494903a~WVH9-PMMS2024920249epcas2p4y; Wed, 17 Apr 2019 17:53:47 +0000 (GMT) X-AuditID: b6c32a45-d47ff70000001063-0c-5cb7682cbb09 Received: from epmmp1.local.host ( [203.254.227.16]) by epsmgms2p2new.samsung.com (Symantec Messaging Gateway) with SMTP id 57.EF.03620.B2867BC5; Thu, 18 Apr 2019 02:53:47 +0900 (KST) Received: from test-PowerEdge-R720.sa.corp.samsungelectronics.net ([107.108.221.212]) by mmp1.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTPA id <0PQ4006MF9PFCC30@mmp1.samsung.com>; Thu, 18 Apr 2019 02:53:47 +0900 (KST) From: Kanchan Joshi To: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org Cc: prakash.v@samsung.com, Kanchan Joshi Subject: [PATCH v4 0/7] Extend write-hint/stream infrastructure Date: Wed, 17 Apr 2019 23:19:59 +0530 Message-id: <1555523406-2380-1-git-send-email-joshi.k@samsung.com> X-Mailer: git-send-email 2.7.4 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmpmkeLIzCtJLcpLzFFi42LZdljTVFcnY3uMwZYmUYuj/9+yWey9pW0x c94dNos9e0+yWFzeNYfNYv6yp+wWV6YsYnZg99i8pN6jb8sqRo/Pm+QCmKO4bFJSczLLUov0 7RK4Mp5/aGAtOChacXf/MuYGxpX8XYycHBICJhIzns9h6WLk4hAS2MEoceDhXSYI5zujRPux LjaYqnMzWhkhErsZJbZvvMYK4Uxnkuj/uIa9i5GDg01AU+LC5FKQuIjAHEaJZfumMYN0MwvY Scz49poVpEZYwF6ia5cFSJhFQFXi1vEzYAt4BZwk5lx+xgqxTE7i5rlOZpA5EgIPWSVePz8C dYWLxN5Dh6FsaYlnqzYyQtjFEr/uHIVq6GCUuN4wkwUiYS9xcc9fJogj+CQ6Dv8FO1RCgFei o00IosRD4sy/CewgtpBArMTk16eYJjCKL2BkWMUollpQnJueWmxUYKhXnJhbXJqXrpecn7uJ ERw1Wq47GGec8znEKMDBqMTDu0J1e4wQa2JZcWXuIUYJDmYlEV7HlC0xQrwpiZVVqUX58UWl OanFhxilOViUxHkfSc+NFhJITyxJzU5NLUgtgskycXBKNTC+FD3gvuoXc5Cw2HJuNfkbemsb 9OqjVxk48KX0NZ1IeSm9PliomOn1r/lTAw7Pe/Fw0pbuYzG+zJ0SL03zshN5Fxpl5nkziTta PFjN9oHJquuYaU+EwB6tr7ffcNZMqatoq1isKntKT9B7c/jd152Hk9LEzz3++f1q5a7iOpb0 +tkRLp47qpVYijMSDbWYi4oTASq1SliWAgAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrOJMWRmVeSWpSXmKPExsVy+t9jAV3tjO0xBiv2GVgc/f+WzWLvLW2L mfPusFns2XuSxeLyrjlsFvOXPWW3uDJlEbMDu8fmJfUefVtWMXp83iQXwBzFZZOSmpNZllqk b5fAlfH8QwNrwUHRirv7lzE3MK7k72Lk5JAQMJE4N6OVsYuRi0NIYCejxIKFz6CcmUwSvx7N YO5i5OBgE9CUuDC5FCQuIjCHUaJn93pWkG5mATuJGd9es4LUCAvYS3TtsgAJswioStw6foYN xOYVcJKYc/kZK8QyOYmb5zqZJzByLWBkWMUomVpQnJueW2xUYJSXWq5XnJhbXJqXrpecn7uJ Eej9bYe1+ncwPl4Sf4hRgINRiYd3her2GCHWxLLiytxDjBIczEoivI4pW2KEeFMSK6tSi/Lj i0pzUosPMUpzsCiJ8/LnH4sUEkhPLEnNTk0tSC2CyTJxcEo1MAYrZcWefKzbuS1rIjPPfJ2q dzb5xk/Yd8hnPU27aS8ozim44ObxKz7nFDeflkjn25Ahccr4wL77vxKaYrgWZP0v3XqgZM60 B/lX5sgvatncdjZ6o09lJFv1t+ItuXw/eHZrqZVMUXE10Gi69K5ERemY+V/523frrl91yNy6 7qOO941red4c3kosxRmJhlrMRcWJAOalJMD6AQAA X-CMS-MailID: 20190417175347epcas2p41e4240ab83b46c9f07d237fc9494903a CMS-TYPE: 102P X-CMS-RootMailID: 20190417175347epcas2p41e4240ab83b46c9f07d237fc9494903a References: Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP V4 series, towards extending write-hint/streams infrastucture so that file-systems and other kernel-mode components can use write-hints which are separate from user-space ones. Also this introduces support for sending write-hint with Ext4/JBD2 journal. Here is the changelog/history - Changes since v3: - Correction in grouping related changes into patches - Rectification in commit text at places Changes since v2: - Introduce API in block layer so that drivers can register stream info. Added new limit in request queue for this purpose. - Block layer does the conversion from write-hint to stream-id. - Any write-hint beyond registered limit turn to 0. - New macro "WRITE_LIFE_KERN_MIN" can be used as base by kernel mode components. Changes since v1: - introduce four more hints for in-kernel use, as recommended by Dave chinner & Jens axboe. This isolates kernel-mode hints from user-mode ones. - remove mount-option to specify write-hint, as recommended by Jan kara & Dave chinner. Rather, FS always sets write-hint for journal. This gets ignored if device does not support stream. - Removed code-redundancy for write_dirty_buffer (Jan kara's review comment) V3 patch: https://marc.info/?l=linux-block&m=155384631909082&w=2 V2 patch: https://patchwork.kernel.org/cover/10754405/ V1 patch: https://marc.info/?l=linux-fsdevel&m=154444637519020&w=2 Kanchan Joshi (7): fs: introduce write-hint start point for in-kernel hints block: increase stream count for in-kernel use block: introduce API to register stream information with block-layer block: introduce write-hint to stream-id conversion nvme: register stream info with block layer fs: introduce APIs to enable passing write-hint with buffer-head fs/ext4,jbd2: add support for sending write-hint with journal block/blk-core.c | 20 ++++++++++++++++++++ block/blk-settings.c | 12 ++++++++++++ drivers/nvme/host/core.c | 23 ++++++----------------- fs/buffer.c | 18 ++++++++++++++++-- fs/ext4/ext4_jbd2.h | 1 + fs/ext4/super.c | 2 ++ fs/jbd2/commit.c | 11 +++++++---- fs/jbd2/journal.c | 3 ++- fs/jbd2/revoke.c | 3 ++- include/linux/blkdev.h | 7 ++++++- include/linux/buffer_head.h | 3 +++ include/linux/fs.h | 2 ++ include/linux/jbd2.h | 8 ++++++++ 13 files changed, 87 insertions(+), 26 deletions(-)