Re: Should fcntl operations check attributes with the server when NFS shares are mounted noac?

[Peter Staubach <staubach@redhat.com>]

Trond Myklebust wrote:

>>I would disagree somewhat.  There is a customer who has stumbled into this
>>situation.  We know that there is a bug here, that it has affected at one
>>customer, and the risk for fixing it is very small.  The gains might not be
>>obvious, but it would make at one customer even slightly happier.  That's
>>worth the small amount of effort that it would take to fix this.
>>    
>>
>
>Will the customer be happy to find out that the application breaks in
>much more nefarious ways as a result of a non-working lease?
>
>If this is Samba, then the correct answer is obvious: turn off oplocks
>in the configuration file since they won't ever work as expected anyway.
>

Well, it may or may not break, actually.  I would think that it would depend
upon what assumptions were being made by the application.

I would still suggest that the cost of fixing something which is clearly
broken is outweighed by the benefit of making a customer, at least 
temporarily,
happy.  If that customer is porting something from a system does support
F_SETLEASE, such as Solaris, and was happy with the way that it worked 
there,
then they may be happy with the current support of F_SETLEASE in Linux.

It is even possible that they were using leases for some reason instead of
file/record locking.  Who knows?  :-)

    Thanx...

       ps


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