[lxc-users] Disk space not released after deleting rootfs image

[Serge Hallyn]

Quoting Cal Leeming [Simplicity Media Ltd] (cal.leeming at simplicitymedialtd.co.uk):
> On Fri, Dec 13, 2013 at 9:46 AM, Jinn Ko <lxc-users at mx.ixido.net> wrote:
> 
> >  When you run 'lsof | grep /tmp/lol/disk2.img' does that say '(deleted)'
> > next to it?  If so, it should also identify the process id holding the file
> > handle open, which is preventing the release of the space.
> >
> 
> No, there is no entry in lsof for that file.
> 
> It also doesn't seem to show any entry even when lxc-start is running. I'm
> thinking perhaps it doesn't show up in here because it's a kernel module
> maybe, but my knowledge on that isn't great.
> 
> 
> >
> > From the log output it looks like the failure to mount /proc inside your
> > container causes a failure, so I haven't understood how it is that
> > lxc-execute works.  Therefore I'm wondering if the failure handling is
> > missing the logic to release the mounted image.  I'm curious to know if the
> > space is released when /proc is properly mounted and the container comes up
> > cleanly.
> >
> 
> Sadly I'm still able to reproduce this problem when the container comes up
> cleanly.
> 
> Scenario here;
> http://pastebin.com/VB2iRQ6z

I tried to reproduce this on trusty (3.12 kernel) but the file went away
fine for me.