Hello,Please ignore, that applies to old kernels only, not to 2.6.14.
Documentation/filesystems/tmpfs.c currently says:
If nr_blocks=0 (or size=0), blocks will not be limited in that instance;
if nr_inodes=0, inodes will not be limited.
However, mounting a tmpfs with "mount -t tmpfs -o size=0 tmpfs /root/tmpfs" results in a tmpfs where only zero-sized files can live. So either this behaviour should be fixed to be in accordance with the documentation, or the documentation should reflect the current behaviour.