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Wong" Reply-To: <20231206204442.771430-1-willy@infradead.org> From: Pankaj Raghav Subject: [PATCH] mm: Support order-1 folios in the page cache Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [106.110.32.65] X-ClientProxiedBy: CAMSVWEXC01.scsc.local (2002:6a01:e347::6a01:e347) To CAMSVWEXC02.scsc.local (2002:6a01:e348::6a01:e348) X-Brightmail-Tracker: H4sIAAAAAAAAA01SfVCLcRz32/O0Pc2tHkP7Kuwac+TMS+GJZNHxuBOF83pexp4StbqtKG7k 1J3CNsVhdczhSlKa9bKIk7tSojsmMy51erm6iMbFRbE9cf33ue/n5ff9fO9HYMJiD18iVpXE qFWKOAmXj5fX/myao9QWM/PSWkKoV+1elKm3mkt19Otw6m1XHk49qK7HqZaiYQ/KbuhAVL8l l0MN/sjjyj3pxyW9OG0yJ9P3CgJoc2Emlzb3Z/PoK/VRdInlNU47zVMjie38ECUTF3uIUc8N 3cPfb7t3A0u08lL0DVvS0KBHFvIkgAyCzowObhbiE0KyAEFuUSvPRQjJbwj015Qs4URgariI /3OU5t5HLJGPwHEmA/1XtRif4KzdisD6QeDCAjIUTg1XcLIQQeCkFJ7qKHY8Duovt7vlE0kx fHBccr+MkSJwtF91yyeQM6HXssAVj5HNCEprHuGuuZBcDAOmMBfkkgFwItPtHE8ug7aBJg6b MgsyKgZHEsVQ8SkPY9f3h+y3fSPltdBgcXBc8UDmeELlkMn9LJDhkKWnWc146Kmz8Fg8GZ7l nBk5w1HosA9irDf9762sJVzWuxR0jXEsDAPr3QMs9AL7p3HsNl6QXX4RMyCpcdQZjKOqG0cV MI4qYEJ4IRIxyZr4GEYTqGIOyzSKeE2yKka2LyHejP5+qWdDdd8rUUHPV1kN4hCoBgGBSSYI 7JOKGaFAqUg9wqgTdquT4xhNDfIjcIlIIFWKGSEZo0hiDjJMIqP+x3IIT980jvfhhVt5bdKm szDb5+jMjaqKxNCEhB5xsW/wev8L6Vpb1K0mfWDSkTel07wkIqszRWYr716XXXd7Q6FPYXiQ uTlixvHosrYrkY2C05wImc/ASaHIb+90268Z6LngScvHTZ1mW7V8gXpf43vDjqoX3y58rn+f XtbrvfPLu7AiOnd96vFmw67hKfpg6FoSKDdGODM735Q//cXP32nIX5s6tuR367na1ZNuUpU/ dKqbzpff7YvumKKObevfnDMUoYtWrXqYEuXX93Pza27sg/NVBcset/aJfbThkXkx8mmO5bdT /Lu6V3Y/CpHKU4Orzk9Zs1Bbu9R7xVhT8Jay6UH+0ddfjbkkwTX7FfMDMLVG8QeTviJPwQMA AA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrBIsWRmVeSWpSXmKPExsVy+t/xu7optetSDa4/ULS4/ITPYsGbvWwW Tz/1sVjcfD6HxWLP3pMsFvfW/Ge1uDHhKaPFpy2zmSx+/5jD5sDpcXD9GxaPBZtKPTav0PLY tKqTzWPTp0nsHvNOBnqs33KVxePzJrkAjig9m6L80pJUhYz84hJbpWhDCyM9Q0sLPSMTSz1D Y/NYKyNTJX07m5TUnMyy1CJ9uwS9jCublzAX7GSv6D8V3sD4m7WLkZNDQsBEYuPs3YxdjFwc QgJLGSXePG1kg0jISGz8chWqSFjiz7UusLiQwEdGid+/3SEadjJKXD74khEkwStgJ9HxfztT FyMHB4uAqsSJPguIsKDEyZlPWEBsUQF5ifu3ZrCD2MwC4hK3nswHKxcR0JB4s8UIInyNUeLD u1KQsJCAucT3BY4gJpuAlkRjJ1ijsICtxMPv55kgqjUlWrf/hhooL7H97RxmiIMVJSbdfA91 fK3E57/PGCcwisxCcs8sJDfMQjJqFpJRCxhZVjGKpJYW56bnFhvqFSfmFpfmpesl5+duYgRG 8bZjPzfvYJz36qPeIUYmDsZDjBIczEoivDck16UK8aYkVlalFuXHF5XmpBYfYjQFhslEZinR 5HxgGskriTc0MzA1NDGzNDC1NDNWEuf1LOhIFBJITyxJzU5NLUgtgulj4uCUamByeZKv+/jk 0uWL3rB+8FqcklIsOT/b6a7SzSvWSs0vmmpmnl8yo28Jo9XJb9H5lad//52anyGxpkTyxczX Ime3ztu/dZakY0W6sJ923L3U9ZMsFu7U+n+aoef015y7cW7b8pkUwwQrjlmVTTGdaSd4+eSP 2mi5WUtL9/Geqd418f2iaWZntn5PEWlwjg4/MlVjxeljl2+mZR3YpjzPeWXjpksRR8+3Gv2+ NGHK90bF1IUMy2UWnVtt53uD8eXKegvbbTuzF5jVn9phHsxy4fp1/98hcyTWhG/p5fTdJdv6 +5O1vdGUo7JND440p91mjmP5FiW3/GPciudBrw8cMo1hvh6hyjerb+qbzsX65v+rTiqxFGck GmoxFxUnAgBU84zFawMAAA== X-CMS-MailID: 20240122143620eucas1p1017072128a3b497fd95b796ebaad71a2 X-Msg-Generator: CA X-RootMTR: 20240122143620eucas1p1017072128a3b497fd95b796ebaad71a2 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20240122143620eucas1p1017072128a3b497fd95b796ebaad71a2 References: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: E72BC120003 X-Stat-Signature: 5we7uaemshbpmd5tjstdjez3uqm5itp8 X-Rspam-User: X-HE-Tag: 1705934183-962729 X-HE-Meta: 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 FlScUXCQ Xsyq53YfDlbjILcMwGtNvC4T4EALmyHLS8EcTdvVWJMY8y00UEP+x0JoHyIC0Eoadatgq/RWMDBnrG0nviAzGUXC/pvX+diWnxRG6lfFnIX4DySTrRbfOrChu2hnqcL44PCFEuoctQ2QNsb2CmR60J8gEyJuoS3jW+S9Iyw/OXk8uoijpCUMZ8+2qtxJSXugkOuVcyfO0ydteJMdxVYcmww+mMZvzaCkCqT8p6LgHl2tuAqll5mgDN8c+WxegvbpocdZ/t6hdf+iSaW32TYf0DYz/s5LEw/VCOnrGbb/yAw63z14= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > Folios of order 1 have no space to store the deferred list. This is > not a problem for the page cache as file-backed folios are never > placed on the deferred list. All we need to do is prevent the core > MM from touching the deferred list for order 1 folios and remove the > code which prevented us from allocating order 1 folios. > > Link: https://lore.kernel.org/linux-mm/90344ea7-4eec-47ee-5996-0c22f42d6a6a@google.com/ > Signed-off-by: Matthew Wilcox (Oracle) This is something I was looking forward to while developing the LBS support for XFS. As I am preparing the next version of LBS patches for XFS, I could add this patch on top and start running fstest for 8k block size on a system with 4k page size. I will let you know if something blows up. I haven't seen any new version of this series, so I will use this patch as a starting point to test 8k filesystem blocksize. -- Regards, Pankaj