The kernel patch required to enable this option is handled in bz 489285. This bz has been opened to add support for lookupcache= option in mount.nfs.
Created attachment 334547 [details] Patch to add lookupcache= support for mount.nfs Patch to add support for lookupcache option in mount.nfs.
The required kernel code for this option was included into kernel-2.6.18-136.el5 https://bugzilla.redhat.com/show_bug.cgi?id=489285#c8
Created attachment 342131 [details] Updated patch with updated man page
Fixed in nfs-utils-1.0.9-42.el5
Removing conditional NACK since dev is done.
Are we going to fix mount.nfs4 too?
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2009-1321.html
*** Bug 511312 has been marked as a duplicate of this bug. ***