| Summary: | Time runs too fast in a VM on processors with > 4GHZ freq [rhel-5.4.z] | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | RHEL Program Management <pm-rhel> |
| Component: | kernel | Assignee: | Zachary Amsden <zamsden> |
| Status: | CLOSED ERRATA | QA Contact: | Red Hat Kernel QE team <kernel-qe> |
| Severity: | high | Docs Contact: | |
| Priority: | urgent | ||
| Version: | 5.7 | CC: | akataria, dhecht, dhoward, garrett, jpirko, jsavanyo, knoel, kzhang, mjenner, pbenas, plougher, plyons, pm-eus, prarit, qcai, sghosh, tburke, zamsden |
| Target Milestone: | rc | Keywords: | ZStream |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | kernel-2.6.18-164.35.1.el5 | Doc Type: | Bug Fix |
| Doc Text: |
Previously, on VMware, the time ran too fast on virtual machines with more than 4GHz TSC (Time Step Counter) processor frequency if they were using PIT/TSC based timekeeping. This was due to a calculation bug in the get_hypervisor_cycles_per_sec function. This update fixes the calculation and timekeeping works correctly for such virtual machines.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-05-05 14:38:09 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Bug Depends On: | 673242 | ||
| Bug Blocks: | |||
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Description
RHEL Program Management
2011-03-23 12:13:52 UTC
in kernel-2.6.18-164.35.1.el5 linux-2.6-virt-hypervisor-overflow-fix-for-clocks-4ghz.patch Hi Alok, Would you like to test this bug for 5.4.z kernel please? If yes, we'll post the kernel to you. Thanks!
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New Contents:
Previously, on VMware, the time ran too fast on virtual machines with more than 4GHz TSC (Time Step Counter) processor frequency if they were using PIT/TSC based timekeeping. This was due to a calculation bug in the get_hypervisor_cycles_per_sec function. This update fixes the calculation and timekeeping works correctly for such virtual machines.
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-2011-0489.html |