{"action":"created","issue":{"url":"https://api.github.com/repos/facebook/flashcache/issues/208","labels_url":"https://api.github.com/repos/facebook/flashcache/issues/208/labels{/name}","comments_url":"https://api.github.com/repos/facebook/flashcache/issues/208/comments","events_url":"https://api.github.com/repos/facebook/flashcache/issues/208/events","html_url":"https://github.com/facebook/flashcache/issues/208","id":102511989,"number":208,"title":"Server crash after the implementation of flashcache","user":{"login":"kurtihnet","id":13914755,"avatar_url":"https://avatars.githubusercontent.com/u/13914755?v=3","gravatar_id":"","url":"https://api.github.com/users/kurtihnet","html_url":"https://github.com/kurtihnet","followers_url":"https://api.github.com/users/kurtihnet/followers","following_url":"https://api.github.com/users/kurtihnet/following{/other_user}","gists_url":"https://api.github.com/users/kurtihnet/gists{/gist_id}","starred_url":"https://api.github.com/users/kurtihnet/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kurtihnet/subscriptions","organizations_url":"https://api.github.com/users/kurtihnet/orgs","repos_url":"https://api.github.com/users/kurtihnet/repos","events_url":"https://api.github.com/users/kurtihnet/events{/privacy}","received_events_url":"https://api.github.com/users/kurtihnet/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2015-08-22T07:45:41Z","updated_at":"2015-08-24T08:40:22Z","closed_at":null,"body":"Hi Guys,\r\n\r\nWe have implemented flashcache in our many servers. But some of the servers intermittenly crashed due to fc. We are using 250GB SSD for  flashcache in most of the servers. We have partitioned the SSD drive for 2 servers(125GB each). Those are OpenVZ VE's  mounted on LVM. We have not got any errors from logs. The only seeing is pasted below. \r\n\r\n===\r\nkernel: [   10.913549] device-mapper: flashcache: Allocate 1311596KB (22B per) mem for 61048832-entry cache(capacity:238472MB, associativity:512, block size:8 sectors(4KB))\r\nAug 17 22:25:04 kernel: [   14.070413] device-mapper: flashcache: Allocate 1311596KB (22B per) mem for 61048832-entry cache(capacity:238472MB, associativity:512, block size:8 sectors(4KB))\r\n===\r\nThe above logs seems to be related with flashcache allocation. \r\n\r\nIs there any way to findout the reason?\r\n\r\nNote : Those servers were stable during the past time. But after flashcache implementation, server is going down everyday. Server is running with latest OpenVZ kernel \"2.6.32-042stab108.8\" with flashcache module loaded into it.\r\n\r\n===\r\n[root@~]# lsmod | grep flashcache\r\nflashcache             97759  2 \r\ndm_mod                 95654  13 flashcache,dm_mirror,dm_log\r\n===\r\n\r\nAny help from your end is much appreciated.\r\n"},"comment":{"url":"https://api.github.com/repos/facebook/flashcache/issues/comments/134097516","html_url":"https://github.com/facebook/flashcache/issues/208#issuecomment-134097516","issue_url":"https://api.github.com/repos/facebook/flashcache/issues/208","id":134097516,"user":{"login":"kurtihnet","id":13914755,"avatar_url":"https://avatars.githubusercontent.com/u/13914755?v=3","gravatar_id":"","url":"https://api.github.com/users/kurtihnet","html_url":"https://github.com/kurtihnet","followers_url":"https://api.github.com/users/kurtihnet/followers","following_url":"https://api.github.com/users/kurtihnet/following{/other_user}","gists_url":"https://api.github.com/users/kurtihnet/gists{/gist_id}","starred_url":"https://api.github.com/users/kurtihnet/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kurtihnet/subscriptions","organizations_url":"https://api.github.com/users/kurtihnet/orgs","repos_url":"https://api.github.com/users/kurtihnet/repos","events_url":"https://api.github.com/users/kurtihnet/events{/privacy}","received_events_url":"https://api.github.com/users/kurtihnet/received_events","type":"User","site_admin":false},"created_at":"2015-08-24T08:40:22Z","updated_at":"2015-08-24T08:40:22Z","body":"Hi Mohan,\r\n\r\nI will provide the full stackstrace soon.\r\n\r\n\r\n"}}