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Wed, 1 Aug 2018 14:43:38 +0000 To: Alexander Viro , "linux-fsdevel@vger.kernel.org" , LKML From: Kirill Tkhai Subject: Commit "new primitive: discard_new_inode()" introduces a problem Message-ID: <64a0f022-a32d-d4ee-7464-5c5ce0ebd222@virtuozzo.com> Date: Wed, 1 Aug 2018 17:43:35 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [185.231.240.5] X-ClientProxiedBy: AM3PR07CA0116.eurprd07.prod.outlook.com (2603:10a6:207:7::26) To DB6PR0801MB2024.eurprd08.prod.outlook.com (2603:10a6:4:76::17) X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 9e23403e-af51-4bd0-c5f2-08d5f7bd2b0b X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:(7020095)(4652040)(8989117)(4534165)(4627221)(201703031133081)(201702281549075)(8990107)(5600074)(711020)(2017052603328)(7153060)(7193020);SRVR:DB6PR0801MB2024; X-Microsoft-Exchange-Diagnostics: 1;DB6PR0801MB2024;3:edFIfr3Ne8FQ6deNyfsp2E/4UsJLy8q6EWbjmE4aIlOLY4CVI6uvVWFChD7AKmYr9ZA81+4hU8wR9LcGDCb6RHpIbSYgulOPUgqHGR3AgbXIG6Ii58Iawawr0ThK8GHdzr7UFe/yiss3pViceF2DDp6ZdNai/v0NqGccNSCrAy7P+b2esqJnB/jzZgQIPb3o7mJraiIJHSKGGC4cx1WtXfCenpFlgIy0iuLxqVPAShT3jIyxgrrWq1fy0iRb465D;25:ejg4HOM153CNz1XN2JwXixmZRGE4bMFxeqpLYifQpoyICG/rGpNoS4SMAwP2o+CsjczVnVk/uoj/XCT9A/9B7NEvXbVIViUTTbZmn0x/pyPqdAebyvbl7eMR+IGiroTCCPSd+H7Ve7C0rmZxxPKcLaAqcKEVtxlbCd5nUGkZaYpCb2RDGJjw4kVrUaJbEYzeoR8GoHsAqK/uP1QbDFSSREcrMuw+AENvcrDaWtjk8CYSVRTpD76uuXzuEFLH/BAHcYwDCkEmr8ArAUnAJme32PvReASAQgHwa8+zgr4wSuOwRGNeCDpWxQlO9PG5cVlcwq6busxf3BbNQ9WkAWx00A==;31:2ugiIP5z5fFewelub81cz62bfs3oBVJVmeqcqCcV1zvbqKg1OJxcuIUwOizLv/BMVXnc/LpwR75NJ4gvbfkeCxVyitc1vDUoGvzNAjMKZY8MKaWoNc5O7b7t17Kgu/jsSBGQWZ9Zp8/rBuKBE4J2qKp9eFpVWomq1Qb5MGcmc6yqiOZkZ9hbev/WFqpwOBFkTf50ir+W0XIW4Fo6jSuPoMZllaGyhQiqtp66i54lbow= X-MS-TrafficTypeDiagnostic: DB6PR0801MB2024: X-Microsoft-Exchange-Diagnostics: 1;DB6PR0801MB2024;20: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;4:V/4ybtZRJSRcS9DP0HddZbGhtzWCf6/m7siTObf8egjATUq8POPr2ZDueW/yRwBdHzZ21WsVl3pFbm4p20lQR3CSgOOn0BXoNepRC86YB457IVCLdxO9kYuT/kghX6JK1c1F+Q8eLBh01qvDtaVQjvyeznAaRr3yJoNBlUSPL8RpG70Gn+ISYaDXfUxrE4BvoPdFxk83v94BZl4eu6XGRDdrFt+DmBYq3Quk/1CwNSxcn3ZYhqRmY8l5axHlZYpjnU5BZLqZhvazhsfqzxF9dQ== X-Microsoft-Antispam-PRVS: X-Exchange-Antispam-Report-Test: UriScan:; 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It reproduces 100% in my test VM: # cat /etc/mtab /dev/sda1 / ext4 rw 0 0 proc /proc proc rw 0 0 sysfs /sys sysfs rw 0 0 devpts /dev/pts devpts rw,gid=5,mode=620 0 0 tmpfs /dev/shm tmpfs rw,noexec,nosuid,nodev 0 0 # echo 3 > /proc/sys/vm/drop_caches # cat /etc/mtab cat: /etc/mtab: Cannot allocate memory Though: # free total used free shared buffers cached Mem: 4047432 99988 3947444 0 1340 49148 -/+ buffers/cache: 49500 3997932 Swap: 0 0 0 Kirill