This bug has been copied from bug #480161 and has been proposed to be backported to 5.3 z-stream (EUS).
in 2.6.18-128.18.1.el5
Technical note added. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: Due to the use of an incorrect wait queue in the "dasd_sleep_on_immediatly" function, certain commands (for example, "tunedasd -S") used to stop responding, and system reboot was required in order to stop the running process. With this update, the wait queue has been changed to "generic_waitq", which resolved this issue.
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/RHBA-2010-0508.html