I'm pretty sure that in 3.3.2-6.fc16.x86_64 this sequence worked:
mkdir -p /tmp/testing
mkdir -p foo bar
mount -t tmpfs tmpfs foo/
mount --move foo bar/
With 3.3.5-2.fc16.x86_64 the last step gives:
mount: wrong fs type, bad option, bad superblock on /tmp/testing/foo,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
Didn't test any kernels between those two.
Is this a bug or feature? Didn't see anything is syslog.
Norman Gaywood, Computer Systems Officer
University of New England, Armidale,
NSW 2351, Australia
ngaywood(a)une.edu.au Phone: +61 (0)2 6773 3337
Fax: +61 (0)2 6773 3312
Please avoid sending me Word or Power Point attachments.