Time drift issues in Red Hat Enterprise Linux guests in Microsoft Windows Hyper-V virtualization environment
Issue
- Time is skipping or drifting on Red Hat Enterprise Linux 5 guests in Microsoft Windows Hyper-V.
- Since kernel 2.6.18-194.8.1.el5 we observe large clock drift on RHEL 5.5 / x86_64 guests running on Hyper-V hosts. This clock drift is not happening on older kernels (up to 2.6.18-194.3.1.el5), nor on i386 machines.
- Since kernel 2.6.9-89.0.26.EL we observe large clock drift on RHEL 4.8 / x86_64 guests running on Hyper-V hosts.
- We observed that guests running in RHEV 2.x that was exported and then imported in to RHEV 3.1.1 had an incorrect time by 5 to 10 hours. We had to set date manually to get NTP to adjust it correctly. Is this an expected behavior or a bug?
Environment
- Red Hat Enterprise Linux (RHEL) 5.4, 5.5 (64-bit and 32-bit) virtualization guest, or
- Red Hat Enterprise Linux (RHEL) 4.8 (64-bit and 32-bit) virtualization guest
- Microsoft Windows Hyper-V virtualization host environment
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