Hi,
> > sf...@users.sourceforge.net:
> > > > Do you consider this a bug in aufs, though?
> > >
> > > No.
> > > I think it is a problem of your shutdown script.
> > > Generally any shutdown script executes
> > > - kill all processes
> > > - remount / readonly
> > >
> > > For the system whose root is aufs, the similar scirpt but more
> > > work is necessary. In your case,
> > > - remount ext3 readwrite
> > > - kill all processes
> > > - remount / readonly
> > > I guess.
It is no shutdown script. It is executed at random times.
> > I got another question in my mind.
> > At the end of your rsync script,
> > mount -o remount,ro ${LOWER_BRANCH}
> > Why didn't this remount return an error?
> >
> > By rsync, a file might be renamed. So the inode became
> > - its link count is zero.
> > - its reference count is positive, it is still alive.
> > - its dtime is not set yet. it is set when the reference count
> > reaches zero (in ext3).
> > For such inode, fsck _always_ reports "Deleted inode XXXX has zero
> > dtime" definetly.
> >
> > As long as a process keeps opening a file, aufs has to keep the
> > corresponding file on a branch opened too. It means the inode
> > reference count is kept positive, and its dtime keeps zero until
> > the file is closed.
> >
> > Why does ext3 allow to be readonly in the status which fsck thinks
> > error?
Like Michael Zick pointed to I dumped the filesystem information with
dumpe2fs and the error handling is set to "continue" per default.
I am no expert for ext3 - but I think that read-only is the only state
that is sensible at that time.
Trys to remount the fs read/write fails with an error, as I told.
(which also prevents me from running further copy-downs in the same
session)
# Marcus
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