Upstream has has a rash of elusive problem reports in the last several months with CIFS. I finally was able to get a reproducer and track down the cause of at least one of them. http://git.kernel.org/?p=linux/kernel/git/sfrench/cifs-2.6.git;a=commitdiff;h=f12f98dba6ea1517cd7fbb912208893b9c014c15 ...I also have a patch queued up to fix the way dentries are hashed in the readdir code for case-insensitive mounts. Note that these bugs are generally papered over on RHEL4 by the fact that "noserverino" is the default there.
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release.
Committed in 89.42.EL . RPMS are available at http://people.redhat.com/vgoyal/rhel4/
confirmed the fix is in the -94 kernel. I wasn't able to reproduce the problem with the testcase.
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-2011-0263.html