As mentioned in the description, one way to leak fds is just opening and closing an app. It leaks an fd of type 'anon_inode:[eventfd]' per app connection. I am attaching a simple script I used to reproduce this and track it over multiple app invocations.
Sample output from a run (omitting the lsof and /proc/*/fd information) is: #### Starting at 2015-09-15T08:10:55+0000 #### # Before fds: 119 # During fds: 131 # After fds: 120 #### Starting at 2015-09-15T08:11:02+0000 #### # Before fds: 120 # During fds: 133 # After fds: 121 #### Starting at 2015-09-15T08:11:09+0000 #### # Before fds: 121 # During fds: 134 # After fds: 122 #### Starting at 2015-09-15T08:11:16+0000 #### # Before fds: 122 # During fds: 135 # After fds: 123 ... You can clearly see unity8 leaking one fd every time the app connects and disconnects. ** Attachment added: "start_stop_app.sh" https://bugs.launchpad.net/ubuntu/+source/unity8/+bug/1495871/+attachment/4464861/+files/start_stop_app.sh -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to unity8 in Ubuntu. https://bugs.launchpad.net/bugs/1495871 Title: unity8 leaks file descriptors Status in unity8 package in Ubuntu: Confirmed Bug description: unity8 leaks file descriptors in various cases, causing the process to eventually fail (hang and/or restart). These leaks were first discovered during investigations of https://bugs.launchpad.net /canonical-devices-system-image/+bug/1491566 , but it's not clear yet if they are indeed responsible for that particular bug. In any case, this is a critical problem, and should be addressed independently. The fds are leaked in various scenarios, including: * opening/closing apps * switching between apps * locking the screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity8/+bug/1495871/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
