Yes, the problem is that pcscd's memory consumption is growing over time. It doesn't matter if I stop my application or not. I made the test again and after a minute, memory consumption increased from 22000kB to 28236kB
$ ps aux | grep pcscd && sleep 60 && ps aux | grep pcscd root 7781 0.3 0.2 171316 22000 pts/1 Sl 16:20 0:00 /usr/sbin/pcscd gden 7892 0.0 0.0 11740 928 pts/1 S+ 16:24 0:00 grep --color=auto pcscd root 7781 0.3 0.3 171316 28236 pts/1 Sl 16:20 0:01 /usr/sbin/pcscd gden 7905 0.0 0.0 11740 928 pts/1 S+ 16:25 0:00 grep --color=auto pcscd -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to pcsc-lite in Ubuntu. https://bugs.launchpad.net/bugs/1511674 Title: Memory leak Status in pcsc-lite package in Ubuntu: New Bug description: I noticed that pcscd consumes a lot of memory (5GB after 48h since start) in one of my computers (ubuntu 14.04 64-bit pcsc-lite version 1.8.10.) In debug mode pcscd shows a lot of USB "device removed" notifications: 00000102 hotplug_libudev.c:594:HPEstablishUSBNotifications() Device removed 00001297 hotplug_libudev.c:269:get_driver() Looking for a driver for VID: 0x1D6B, PID: 0x0002, path: /dev/bus/usb/001/001 [cut - long list of usb devices] 00000246 hotplug_libudev.c:269:get_driver() Looking for a driver for VID: 0x03EB, PID: 0x2044, path: /dev/bus/usb/001/067 00022327 winscard_svc.c:319:ContextThread() Received command: CMD_GET_READERS_STATE from client 5 00500329 winscard_svc.c:319:ContextThread() Received command: CMD_GET_READERS_STATE from client 5 00500341 winscard_svc.c:319:ContextThread() Received command: CMD_GET_READERS_STATE from client 5 Flood of "device removed" messages was caused by some broken USB device (not card reader - CDC-ACM device), but it doesn't explain why pcscd allocated 5GB of memory. Is it some memory leak in pcscd? lsb_release -rd: Description: Ubuntu 14.04.3 LTS Release: 14.04 pcscd: Installed: 1.8.10-1ubuntu1 Candidate: 1.8.10-1ubuntu1 Version table: *** 1.8.10-1ubuntu1 0 500 http://pl.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages 100 /var/lib/dpkg/status To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pcsc-lite/+bug/1511674/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp