My Setup: Ubuntu 14.04.05 LTS, encrypted home & swap (but swap disabled,
cause mounting wasnt possible... another known bug).

Over the normal ubuntu usage over the day my RAM stays in a "common range".
When I transfer data to an ntfs (ntfs3g mounted) partition / harddrive or read 
from such a device, my RAM fills up really fast and stays full for the rest of 
the time, till my PC freezes or a force-logout happens.
It really just happens significantly when an ntfs partition is used. My btrfs 
home partition an system doesnt fill the RAM. To clear cache and buffer I just 
need to "remove the drive savely" (or use the kernel parameter drop_cache).

Can anyone reproduce this?

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https://bugs.launchpad.net/bugs/159356

Title:
  System freeze on high memory usage

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