This bug has been copied from bug #663853 and has been proposed to be backported to 5.5 z-stream (EUS).
in kernel-2.6.18-194.32.1.el5 linux-2.6-fs-nfs-set-lock_context-field-in-nfs_readpage_sync.patch
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-2011-0004.html