Jan Engelhardt wrote:
> On Aug 12 2007 21:23, Al Viro wrote:
>>> pivot_root is atomic afaict, for `mount --move` (which I think Al meant
>>> which MS_MOVE - or some C program using mount(2) of your own), you'd
>>> need multiple calls to mount.
>> Move itself is done by a single syscall anyway...
>>
> Yes, but you need needed 2 mounts, 1 chdir and one chroot. Plus, you
> have not freed the data in the rootfs. (Well, neither does
> pivot_root, but run-init from klibc will.)
Yes, which is why it is highly inappropriate for this particular case,
since they have multiple roots that they presumably don't want deleted!
-hpa
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