----- Original Message ----- 
From: "Pádraig Brady" <P@draigBrady.com>
To: "Gilles Espinasse" <g.esp@free.fr>
Cc: "Jim Meyering" <jim@meyering.net>; <8074@debbugs.gnu.org>
Sent: Friday, February 18, 2011 11:54 AM
Subject: bug#8074: Fix sparse-pipe test on 2.6.26 kernel


...
> >
> > If I add a dd if=/dev/null of=pipe conv=notrunc,fdatasync, test
reliabily
> > work too.
> > So I added that in attached patch.
>
> Good testing!
> Interesting to see that fdatasync flushes the pipe to disk.
> However it might be more portable/robust to use `wait`
> rather than that dd command?
>
> cheers,
> Pádraig.
>
wait work fine
Find v2 attached

Gilles