Hello.
This is not a kernel problem, but I think here is the nearest place.
I noticed that mount(8) of util-linux-2.13-0.44.fc6 is passing
wrong flags when 'mount --make-unbindable' is requested.
The mount command is passing MS_MGC_VAL instead of MS_UNBINDABLE(0x20000)
for 'mount --make-unbindable', while it is passing correct flags for
'mount --make-private' 'mount --make-shared' and 'mount --make-slave'.
I don't know this bug is FC6 specific or not.
Can you reproduce?
Regards.
# mount -t tmpfs none /mnt/
# strace mount --make-unbindable /mnt/
mount("none", "/mnt", "tmpfs", MS_MGC_VAL, "") = 0
# strace -e raw=mount mount --make-unbindable /mnt/
mount(0x9d7ce20, 0x9d7ce30, 0x9d7ce40, 0xc0ed0000, 0x9d7d508) = 0
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