This bug has been copied from bug #474091 and has been proposed to be backported to 5.3 z-stream (EUS).
in kernel-2.6.18-128.1.4.el5
incremental patch (474091 comment #40) in kernel-2.6.18-128.1.6.el5
RH QA captured the problem when testing the NONSTOP_TSC feature with 32-bit kernel. She found the clock source under sys fs is still HPET on hp-xw8800-01.rhts.bos.redhat.com. Part of code got neglected from my original back port, because it doesn't appear in the corresponding Upstream commit. And upstream still use this: if (boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) return 0;
The following incremental patch should be include to enable TSC as clock source by default in 32-bit kernel on Intel NHM and newer processors. https://bugzilla.redhat.com/show_bug.cgi?id=474091#c44
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-2009-0326.html
Thanks everyone for all your work on this! As discussed in today's meeting, fix delivered. Internal Status set to 'Resolved' Status set to: Closed by Tech Interim resolution set to 'Hotfix' Resolution set to: 'Completed' Summary edited. This event sent from IssueTracker by jleddy issue 271902