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Tue, 04 Apr 2023 00:56:37 -0700 (PDT) Received: from [10.200.10.217] ([139.177.225.248]) by smtp.gmail.com with ESMTPSA id n6-20020a62e506000000b006227c3d5e29sm8483914pff.16.2023.04.04.00.56.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 04 Apr 2023 00:56:36 -0700 (PDT) Message-ID: <1b164b8b-952c-5786-4e96-df8eddc199e8@bytedance.com> Date: Tue, 4 Apr 2023 15:56:31 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Thunderbird/102.9.1 Subject: Re: [PATCH v2 0/3] Some fixes and cleanup for maple tree. To: Liam.Howlett@oracle.com, Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, maple-tree@lists.infradead.org References: <20230314124203.91572-1-zhangpeng.00@bytedance.com> From: Peng Zhang In-Reply-To: <20230314124203.91572-1-zhangpeng.00@bytedance.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: CDDB9160003 X-Rspamd-Server: rspam09 X-Rspam-User: X-Stat-Signature: 6gxaj1qinuo14tsxun5tm4jisywjd4sq X-HE-Tag: 1680594998-672136 X-HE-Meta: U2FsdGVkX19KCYLaaEax6jjNfDsiWfiyuw2qBQ5rTVMoyJmOTHEZTlQo8PRTAjZs9CSzNvi+ckQDUw/nSfOzpK5ArA07HV7EnS3nCfK/Y9eDKSNcLkKLs5lzgKFLTCTPM6MU6Z4G3Jy3UgsZTk6p4yJSqFgFOZ9j9OFzKK5BLqQvjfmD4QBIjSnSZ5oleLDVbOck+9EeBw+iT2i8c4oeksUuxLORs++1PciHjj72UH8xIb1I3DfUADWT0aDbibnJoCU1LiV3OnBPyBeZBt1VArvJnmgERjYEwuTqCg309xL9rBDgxAZ9YT+EZ7DyYEvV4+vr1P6DXM2OyzPq/yGBdqfu3zktPgAmnqR5o4hishqjHyAKB5OHHgMvZ/P07+ODPxBHdbZAnfMqKBGP8M759h/by0bGn05wkSfUVdw2FRC/guNClXVJfr9NTEF4ms80TpcWSw6CEFunuloGQzUpwJPBb40RK3xcB6iQ7liILr6+dF8BBjyWGGMvMGLGH0vZnNwDUZHUyGwjChvXjAhNj7O3sk+3bqMtPi3uBrRVw/3/DBY3gy2jd5Sl0g2zjf8fQXl4xpYBNKB7+sF3JzsPUh0KVsRWFajq4K1FwumgjJ01ftEHL5fGYww7Iw5vAlLb0T6srldzQRS4pwsN17LhG3tGGOSLagzyXn4VLJyGFqArHlaGSIMR0M048mB8+AYzRT78TgjyOQPLCw3lDNoijFKLjD/PSsi0KOnaFLzwLNbYWXHscVpHbbkS51W2k8AK9j7vHFjGjtfTVFjsT5hb879ebMsEltQW8aSwNWcISw/pOhBkjSO97b19ZEbWAab4546X9/des6/DRZm3G4qx67QT2+vE6xocwjXkRRI0QnYSyc4VKEPm4bJ3ZjNpXCv6NyIRSnvXaxjq7o+udboM60E4M57SZ9ecy7Iw7g+Hg6tdQSnMOf4e19H+miuaU8YYWxlYgrORMOWoJ1+mJ4N o17Ka2ou 8fPR+68T6/P0Ie8vvVXhkkWIdK6FQ2sfUvRi1P96XiyACYuxssW2JYfZVdPX4ocjYNx0y4VBiKzJHNYOBWgiBKgUqCMqsperXho+dxgfa0C1hro5DXY8NouvISC2W6d5kXHLTLnF8grX4Z0k/+5I1Q/+Ns+SMn7buhq6Ez+kE92dvOulkRK2A02oVaV2QIjl5YHj2+aN+NnC+878kCN2ZJJ+OFRNNLEB2RSLMmh4bdNV0Mq2M+uYEhCsLirUFPBKIgaixes+If1/065eItKl5UfP+mMjnVdo6mE5tx6HptVduP4F9FSRxtlRVX4QDXupsqzPPnAwLS9V0/TRT63VJ5L31kyypnyujK4vz+yV2GWohrquX3Vq2WhMTmfXZe3QAYlB3 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000005, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Kindly ping. 在 2023/3/14 20:42, Peng Zhang 写道: > Some fixes and clean up for maple tree. > > The bug fixed by [PATCH v2 1/3] does not seem to be triggered due to some > coincidences, because now the implementation of mtree_lookup_walk() scans > pivots one by one and exits the loop early. The test cases for the bugs fixed by > [PATCH v2 3/3] are difficult to write. If I think of how to write them later, > I will send them out. So I send out the second edition first. > > Changes since v1: > - drop [PATCH 4/4] > - update the commit message of [PATCH 2/4] > - collect Reviewed-bys > - add fixes tags > > Peng Zhang (3): > maple_tree: Fix get wrong data_end in mtree_lookup_walk() > maple_tree: Simplify mas_wr_node_walk() > maple_tree: Fix a potential concurrency bug in RCU mode > > lib/maple_tree.c | 52 ++++++++++-------------------------------------- > 1 file changed, 11 insertions(+), 41 deletions(-) >