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Fri, 29 Mar 2019 16:57:58 +0900 (KST) Received: from epsmgms2p1new.samsung.com (unknown [182.195.42.142]) by epcas1p3.samsung.com (KnoxPortal) with ESMTP id 20190329075758epcas1p335511dcb10bb5592ea72409a1d01e752~QXvUmpArt2752527525epcas1p3c; Fri, 29 Mar 2019 07:57:58 +0000 (GMT) X-AuditID: b6c32a39-8b7ff7000000100c-9d-5c9dd00644be Received: from epmmp1.local.host ( [203.254.227.16]) by epsmgms2p1new.samsung.com (Symantec Messaging Gateway) with SMTP id EA.7F.03598.600DD9C5; Fri, 29 Mar 2019 16:57:58 +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 <0PP40008VBFTTN20@mmp1.samsung.com>; Fri, 29 Mar 2019 16:57:58 +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: axboe@fb.com, prakash.v@samsung.com, anshul@samsung.com, joshiiitr@gmail.com, Kanchan Joshi Subject: [PATCH v3 6/7] fs: introduce write-hint start point for in-kernel hints Date: Fri, 29 Mar 2019 13:23:51 +0530 Message-id: <1553846032-4451-7-git-send-email-joshi.k@samsung.com> X-Mailer: git-send-email 2.7.4 In-reply-to: <1553846032-4451-1-git-send-email-joshi.k@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrBIsWRmVeSWpSXmKPExsWy7bCmvi7bhbkxBu+WW1v8nj6F1eL/nmNs Fkf/v2WzOP/2MJPF3lvaFjPn3WGz2LP3JIvF5V1z2CzmL3vKbnFlyiJmBy6Pic3v2D12zrrL 7rF5Sb1H35ZVjB6fN8kFsEZx2aSk5mSWpRbp2yVwZWx92MhcMJG1Yv3hVtYGxoUsXYycHBIC JhIn1x4Bsrk4hAR2MEr0fvvKDOF8Z5RoeHeKvYuRA6yqYa4lRHw3o8ShzU/ZIJzpTBLPm7ey gBSxCWhKXJhcChIXEZjDKLFs3zRmkBXMAuUSf6dcZQSxhQWCJLbNncEKYrMIqEo83nMT7Axe ASeJdy/7mSFOkpO4ea4TzOYUcJb4eL0Z7DwJgQVsEv8enWCFKHKR2HrwNRvEddISl47aQoSL JX7dOcoMUd/BKHG9YSbUn/YSF/f8ZYI4iE/i3dceVoheXomONiGIEg+JTfO3QoNiGqPE4mer 2CYwSixgZFjFKJZaUJybnlpsWGCqV5yYW1yal66XnJ+7iREcf1qWOxiPnfM5xCjAwajEw/th 95wYIdbEsuLK3EOMEhzMSiK8gefmxgjxpiRWVqUW5ccXleakFh9ilOZgURLnXe/gHCMkkJ5Y kpqdmlqQWgSTZeLglGpgTDkz8Q5j52Fj1qLPOcz30jPyzVkOXdavTerqFMlbZxYnNcvfOnVT p9cJh5nszZNTfOZeU5N34snI3iDq6cSpNenr5MXBW/M3/SgX/2vePEfqc473ReXdmtUszZlu hW91og1e/L/43aVd7kj3i2q2o8I39sgumlshuM1P+Lf/F82tpy/MqJunxFKckWioxVxUnAgA PJjGursCAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprOLMWRmVeSWpSXmKPExsVy+t9jAV22C3NjDI7PlLD4PX0Kq8X/PcfY LI7+f8tmcf7tYSaLvbe0LWbOu8NmsWfvSRaLy7vmsFnMX/aU3eLKlEXMDlweE5vfsXvsnHWX 3WPzknqPvi2rGD0+b5ILYI3isklJzcksSy3St0vgytj6sJG5YCJrxfrDrawNjAtZuhg5OCQE TCQa5lp2MXJxCAnsZJTofzafEcKZySRxcXo3WBGbgKbEhcmlIHERgTmMEj2717OCxJkFyiWm bOLsYuTkEBYIkDh+9iILiM0ioCrxeM9NMJtXwEni3ct+ZhBbQkBO4ua5TjCbU8BZ4uP1ZrAa IaCatfcb2Ccw8ixgZFjFKJlaUJybnltsVGCYl1quV5yYW1yal66XnJ+7iREYXNsOa/XtYLy/ JP4QowAHoxIP74ydc2KEWBPLiitzDzFKcDArifAGnpsbI8SbklhZlVqUH19UmpNafIhRmoNF SZz3dt6xSCGB9MSS1OzU1ILUIpgsEwenVANjkuTlo8YZ6Tus7j12Xy4bN71V9/epeQqOV04/ 6z/R5uZzievVlgUlT9+o6T1SXdweIX8kY4WTYc/97vRV34U6PCw9hCa8ucD6tOeyUtKn3gMn zpis1zNLsu6/Zjw7olfn9PI1cv68u1jYlsfVPuuS9laKPW9s6a97/bkSZ3fui8/62U6/P+xQ YinOSDTUYi4qTgQAcNqBAioCAAA= X-CMS-MailID: 20190329075758epcas1p335511dcb10bb5592ea72409a1d01e752 CMS-TYPE: 101P X-CMS-RootMailID: 20190329075758epcas1p335511dcb10bb5592ea72409a1d01e752 References: <1553846032-4451-1-git-send-email-joshi.k@samsung.com> Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org kernel-mode components can define own write-hints using "WRITE_LIFE_KERN_MIN" as base. Signed-off-by: Kanchan Joshi --- include/linux/fs.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/fs.h b/include/linux/fs.h index 29d8e2c..6a2673e 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -291,6 +291,8 @@ enum rw_hint { WRITE_LIFE_MEDIUM = RWH_WRITE_LIFE_MEDIUM, WRITE_LIFE_LONG = RWH_WRITE_LIFE_LONG, WRITE_LIFE_EXTREME = RWH_WRITE_LIFE_EXTREME, +/* Kernel should use write-hint starting from this */ + WRITE_LIFE_KERN_MIN, }; #define IOCB_EVENTFD (1 << 0) -- 2.7.4