Bug 485428
Summary: | IBM LS20/LS21 blades fail to boot RT kernel when HPET enabled in BIOS | ||||||
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Product: | Red Hat Enterprise MRG | Reporter: | Clark Williams <williams> | ||||
Component: | realtime-kernel | Assignee: | Luis Claudio R. Goncalves <lgoncalv> | ||||
Status: | CLOSED ERRATA | QA Contact: | David Sommerseth <davids> | ||||
Severity: | medium | Docs Contact: | |||||
Priority: | low | ||||||
Version: | 1.1 | CC: | bhu, davids, dvhltc, johnstul, ovasik, williams | ||||
Target Milestone: | 1.1.1 | ||||||
Target Release: | --- | ||||||
Hardware: | All | ||||||
OS: | Linux | ||||||
Whiteboard: | |||||||
Fixed In Version: | Doc Type: | Bug Fix | |||||
Doc Text: | Story Points: | --- | |||||
Clone Of: | Environment: | ||||||
Last Closed: | 2009-03-27 00:15:18 UTC | Type: | --- | ||||
Regression: | --- | Mount Type: | --- | ||||
Documentation: | --- | CRM: | |||||
Verified Versions: | Category: | --- | |||||
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
Cloudforms Team: | --- | Target Upstream Version: | |||||
Embargoed: | |||||||
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The patches listed below were added to kenel -103 and fixed the issue: - [time] IBM LS20/LS21 blades fail to boot with HPET enabled in BIOS [485428] - [time] fix hpet timer reinit for x86_64 *** Bug 483006 has been marked as a duplicate of this bug. *** Tried to boot 2.6.24.7-101 on ls21-1.farm.hsv.redhat.com with HPET enabled in BIOS. Failed. Booted 2.6.24.7-107 successfully. 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-2009-0360.html |
Created attachment 331835 [details] First cut at a fix for HPET boot hang Description of problem: If the High Precision Event Timer is enabled in the BIOS, the MRG RT kernel hangs on boot. HPET is desirable as it has less overhead than the acpi_pm timer the LS blades use currently. Version-Release number of selected component (if applicable): all MRG kernels How reproducible: Always Steps to Reproduce: 1. Enable HPET in LS21 BIOS 2. Boot any MRG RT kernel Actual results: System hangs during boot Additional Info: John Stultz of IBM is looking at this and has a possible solution