From User-Agent: XML-RPC

HOTFIX Requested http://seg.rdu.redhat.com/scripts/hotfix/edit.pl?id=388

Please inform the customer that /proc/sys/vm/kscand_work_percent is a tunable
parameter that can be set between 1 and 100 inclusive.  Setting it to a lower
value causes kscand to run more often and do less work every time it runs. 
Lower values will result is shorter pauses however the overhead or scheduling
kscand more often might result in a slight performance degradation.  Please have
the customer try lowering this parameter below 10 to see if the pauses disappear
completely.

Larry Woodman

A fix for this problem has just been committed to the RHEL3 U6
patch pool this evening (in kernel version 2.4.21-32.12.EL).

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 the 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-2005-663.html