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Tue, 7 Jul 2020 06:09:29 +0000 (GMT) From: "Kiwoong Kim" To: "'Avri Altman'" , , , , , , , , , , , , In-Reply-To: Subject: RE: [RFC PATCH v1] ufs: introduce async ufs interface initialization Date: Tue, 7 Jul 2020 15:09:29 +0900 Message-ID: <000801d65425$2ce3ad50$86ab07f0$@samsung.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Outlook 16.0 Thread-Index: AQJf3Lb61o2624A7HIYY502pzJR6wwGotN4cAhHmw+Knyrt0YA== Content-Language: ko X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrCJsWRmVeSWpSXmKPExsWy7bCmhe4sQZZ4g/WbtS0ezNvGZrG37QS7 xcufV9ksDj7sZLGY9uEns8Wn9ctYLX79Xc9usXrxAxaLRTe2MVl0X9/BZrH8+D8mi667Nxgt lv57y+LA63H5irfH5b5eJo8Jiw4wenxf38Hm8fHpLRaPvi2rGD0+b5LzaD/QzRTAEZVjk5Ga mJJapJCal5yfkpmXbqvkHRzvHG9qZmCoa2hpYa6kkJeYm2qr5OIToOuWmQN0spJCWWJOKVAo ILG4WEnfzqYov7QkVSEjv7jEVim1ICWnwNCwQK84Mbe4NC9dLzk/18rQwMDIFKgyISfj2Zmr LAUnWSrWXjrI1MB4nrmLkZNDQsBEYuKeiYxdjFwcQgI7GCUaJr1lgXA+MUosPbeMCaRKSOAz o8SZvkCYjtdLvrFAxHcxSvyZVgbR8IJRYu2GXrAEm4C2xLSHu1lBEiIC95kkjux8AJbgFIiV 2HqgC2yqsIC/xKe5S8HiLAIqEh0zljGC2LwClhKNSx8xQ9iCEidnPgGrYQYaumzha6i7FSR+ Pl3GCmKLCDhJrLrQAFUjIjG7s40ZZLGEwAkOic7Xn1ghGlwkppy9wQRhC0u8Or6FHcKWknjZ 3wZl10vsm9rACtHcwyjxdN8/RoiEscSsZ+1ANgfQBk2J9bv0QUwJAWWJI7eg9vJJdBz+yw4R 5pXoaBOCaFSW+DVpMtQQSYmZN+9AbfKQWH/zM9sERsVZSL6cheTLWUi+mYWwdwEjyypGsdSC 4tz01GKjAkPkyN7ECE7OWq47GCe//aB3iJGJg/EQowQHs5IIb682Y7wQb0piZVVqUX58UWlO avEhRlNguE9klhJNzgfmh7ySeENTIzMzA0tTC1MzIwslcd5cxQtxQgLpiSWp2ampBalFMH1M HJxSDUzKCo8VO+5mBwotu3bgQV6+29H/69NeCgj6CrznWZxdX9BjIz05KGfjhZ7WhIV73/Uc 2aay+37Qprq5GnfUPRLqJGo/PE42embAkyi1d8bU5ckzbjjvimyoq4uX29ax46bV6Uy1NZ97 xOWi/gh/YJ/0sTln21bGk4X6S22dX1zfNTsxPXCh8Dr96cu16z05jLpP7rGuzvudp+fgePpM c/z6z2yflUyWf09kWte1dNq/kkgjoas5labmWg+bZ7+NNX+sJb2O5+YyK8bG/P9zF3BuEbkl aL80xpj/o8G7pJVWF+b80+rYaOD3TuJbUU7yhhIvX/to1oD0dX2fKgVNl92udGs3FI14+DTd +rfwXCWW4oxEQy3mouJEAKt/EFJXBAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrMIsWRmVeSWpSXmKPExsWy7bCSvO5MQZZ4g6YnRhYP5m1js9jbdoLd 4uXPq2wWBx92slhM+/CT2eLT+mWsFr/+rme3WL34AYvFohvbmCy6r+9gs1h+/B+TRdfdG4wW S/+9ZXHg9bh8xdvjcl8vk8eERQcYPb6v72Dz+Pj0FotH35ZVjB6fN8l5tB/oZgrgiOKySUnN ySxLLdK3S+DKmPR9AnvBeZaKV4v/MTUwXmTuYuTkkBAwkXi95BsLiC0ksINRYtYZIYi4pMSJ nc8ZIWxhifstR1i7GLmAap4xShy51scEkmAT0JaY9nA3WEJE4C2TxJ3bl5kgql4ySixt3cIK UsUpECux9UAXUIKDQ1jAV+LRXw2QMIuAikTHjGVgG3gFLCUalz5ihrAFJU7OfAJ2ETPQgqc3 n8LZyxa+hrpaQeLn02Vg40UEnCRWXWiAqhGRmN3ZxjyBUWgWklGzkIyahWTULCQtCxhZVjFK phYU56bnFhsWGOWllusVJ+YWl+al6yXn525iBMejltYOxj2rPugdYmTiYDzEKMHBrCTC26vN GC/Em5JYWZValB9fVJqTWnyIUZqDRUmc9+ushXFCAumJJanZqakFqUUwWSYOTqkGpoOR62O6 Z3sk+FzYfVlm775G3QUbHt/lyHjJcfHd8Z7A14ZnXoVf5n0YI+42TVvIcqJoS56byA2DlZ55 BRf2XksJjo6fJdT5Ouq0ourRH+wm39s/xK6x/PdIgY/lQHiz7hMJg12RJjLsxadnTs1wTWQ6 2bzzm04o0/ONb/Y0Gk5O0c+9xtKwIPdtf93hOxefTDx95IcNR8qvZdntnQuzKg49tag0klVy vSoxKVsvb03SkvSvazbZRTreYPZfGLiv6lyP7tkFInkX3oRWrfD8OiG/k2nR5jehpyw1w2pn Wf8RKvj8bInwjDa1I9e6DuyMkP076d2Ct5dMDRWC9Jz3WQW/P/NCP2vi7FjZR8vvSCqxFGck GmoxFxUnAgByuvG+NgMAAA== X-CMS-MailID: 20200707060929epcas2p2ee3a7058f5674b4be1cd483e8aa80b55 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20200702082826epcas2p2face6d1689c2f5efc1dcdb53c19804b8 References: <1593678039-139543-1-git-send-email-kwmad.kim@samsung.com> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org > > When you set uic_link_state during sleep statae to UIC_LINK_OFF_STATE, > > UFS driver does interface initialization that is a series of some > > steps including fDeviceInit and thus, You might feel that its latency > > is a little bit longer. > > > > This patch is run it asynchronously to reduce system wake-up time. > Can you share your initial testing findings? > How much time does it save? Will share when I'm done. And I think you might already know and the time is variant per device and its situation, particularly for fDeviceI= nit. Thanks. Kiwoong Kim