I have a server where we use tmpfs as a cache for temporary files used by a web application. But occasionally this tmpfs thinks it is full when it isn't. [root at flask-yellow tmpfs]# touch file touch: cannot touch `file': No space left on device [root at flask-yellow tmpfs]# df -k Filesystem 1K-blocks Used Available Use% Mounted on none 393216 19296 373920 5% /srv/tmpfs Simply unmounting and remounting /srv/tmpfs resolves the issue. 2.6.18-164.11.1.el5 Any suggestions as to the cause of this or workarounds are appreciated.