[Cluster-devel] Re: [NFS] [PATCH 2/4 Revised] NLM - set per fsid grace period

[Olaf Kirch]

On Thursday 05 April 2007 23:52, Wendy Cheng wrote:
> This change enables per NFS-export entry lockd grace period. The 
> implementation is based on a double linked list fo_fsid_list that 
> contains entries of fsid info. It is expected this would not be a 
> frequent event. The fo_fsid_list is short and the entries expire within 
> a maximum of 50 seconds.  The grace period setting follows the existing 
> NLM grace period handling logic and is triggered via echoing the NFS 
> export filesystem id into nfsd procfs entry as:

Your patch creates a new per-export structure that is private to lockd.
It may be easier to put the grace period value into the export entry,
and check for that in nlm_fopen. It feels more natural than adding
a whole new shadow export table just for the benefit of lockd.
(Especially when you consider future extensions like being able
to search the list by dev_t or uuid or whatever)

Olaf
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