Please don't reply to lustre-devel. Instead, comment in Bugzilla by using the 
following link:
https://bugzilla.lustre.org/show_bug.cgi?id=11563



In reply to comment #3)
> OK. We had to upgrade to 1.4.8 due to the problem with zero padded files as
> reported in bug #11527. But 1.4.8 changes the behaviour for some fctl calls.
> Now all flock calls returns ENOSYS by default. This breaks one of our
> applications.  This application works just fine with the filesystem remounted
> with the -o flock option, but that breaks WingIde and Samba. (And perhaps a
> couple of other applications...)
> 
> We need a workaround fast. Could we downgrade the clients to 1.4.7 to avoid
> the problem? Or could the bug #11527 be backed out in some way? (It forces
> usage of the flock mount option when it's not ready) 

It should be possible to downgrade the clients to 1.4.7.3 to avoid the flock
issues - the 10730 bug only affects servers.

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