App Trace Roll: Users Guide: 
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The App Trace Roll works out-of-the-box with RedHat kernel version 2.6.9-22. If you update your RedHat kernel, you'll need to download a new kernel-debuginfo package from RedHat's FTP site. The version of the kernel-debuginfo package must match that of the kernel that is running on the compute nodes.
The kernel-debuginfo packages can be found under: ftp://ftp.redhat.com/pub/redhat/linux/updates/enterprise/4WS/en/os/Debuginfo. If you download a new kernel-debuginfo package, follow the procedure Adding Packages to Compute Nodes in order to install this package onto your compute nodes.