bug#25930: optimize mv for multiple bind mounts

[Assaf Gordon]

close 25930
stop

(triaging old bugs)

On 2017-03-04 1:01 a.m., Sven Joachim wrote:
> On 2017-03-02 13:16 -0800, L A Walsh wrote:
>
> > Sven Joachim wrote:
> > > ,----
> > > |   EXDEV  oldpath and newpath are not on the same mounted filesystem.
> > > |          (Linux  permits  a  filesystem  to  be  mounted at multiple
> > > |          points, but rename() does not work across  different  mount
> > > |          points, even if the same filesystem is mounted on both.)
> > >    
> > ----
> >     That's unfortunate, as Windows recognizes moves between
> > the same device and does a rename vs. a copy (i.e. it doesn't
> > matter if the mounted object from the mount is different, as
> > long as the rename happens between the same devices).
>
> Linux used to do the same in kernel 2.2, but changed the behavior when
> bind mounts were introduced in 2.4.0.  In other words, it's deliberate.

Given the above (kernel limitation), I'm closing this bug.
Discussion can continue by replying to this thread.

-assaf