On Saturday, April 06, 2013 06:23:11 PM you wrote:
> "V.Krishn":
> > Linux Microknoppix 3.3.7-64 #40 SMP PREEMPT Tue May 22 08:47:38 CEST 2012
> > x86_64 GNU/Linux
> >
> > > aufs version?
> >
> > How to get this?
>
> It is printed when you load aufs. See your kernel log.
> In another mail, you wrote
> #define AUFS_VERSION "3.2-20120312"
> but I'd like to make sure via kernel log.
dmesg|grep aufs
aufs 3.3-20120420
>
> > > If you can run "strace umount u", then show me its output please.
> >
> > execve("//bin/umount", ["umount", "u"], [/* 22 vars */]) = 0
> >
> > readlink("/tmp/u", 0xfff9de59, 4096) = -1 ESTALE (Stale NFS file
> > handle)
>
> In your strace output, readlink(2) returns ESTALE very early before
> actual umount(2).
> I am afraid no one can touch your /tmp/u already.
> When and how such situation began? What did you do?
> Something like "umount -l u"?
I generally use just umount and sometimes -f option.
Simulated the issue in
kvm -m 256 -cdrom /media/sdd1/iso/systemrescuecd-x86-2.8.1.iso
to get the same result.
Steps.
1. cd /tmp
2. mkdir branch ro u
3. mkisofs -o temp.iso somefiles....
4. mount temp.iso ro....
....other steps ....
then deleted branch.... same problem from here...
I know modifying branch dir directly is not recommended,
I was unable to unmount the locked .iso file which became an issue.
--
Regards.
V.Krishn
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