Re: 2.6.21-git10/11: files getting truncated on xfs? or maybe an nlink problem?

Matt Mackall
2007-05-12T12:47:04Z

On Sat, May 12, 2007 at 01:21:41PM +0200, Jan Engelhardt wrote:
>
> On May 10 2007 10:38, Matt Mackall wrote:
> >>
> >> for i in `seq 20`; do
> >> hg clone -U --pull a b-$i
> >> hg verify b-$i # always OK
> >> umount /home
> >> sleep 5
> >> mount /home
> >> hg verify b-$i # often found truncated files
> >> done
> >>
> [...]
> >
> >This test looks like it should consist solely of open-for-append and
> >write on about 20k files in the target directory. Because of the
> >--pull, no hardlinks are involved. It shouldn't be all that different
> >from doing tar cf - a | tar xf - b.
> >
> >The files get visited in alphabetical order, so the start of the
> >corruption may be telling.
>
> You should not assume alphabetical order. Filesystems may be free to
> reorder things and return them (1) randomly like in a hash (2) by
> creation time during readdir().

There is no assumption. Mercurial explicitly visits files in
alphabetical order for the above commands.

--
Mathematics is the supreme nostalgia of our time.