Red Hat Bugzilla – Bug 243979
PV-on-HVM interrupts not delivered promptly in APIC mode
Last modified: 2007-11-30 17:07:44 EST
The delivery of PV-on-HVM interrupts are broken in APIC mode. When the guest is
woken up it fails to inject an interrupt immediately into it. Therefore the
interrupt is only delivered when the next interrupt (usually a timer interrupt)
Booting with noapic cures the problem. The problem is also fixed in Xen 3.1.
We should be fine for RHEL 5.1 then, since we are upgrading the hypervisor to
The Xen 3.1.0 hypervisor got merged in 2.6.18-29.el5.
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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 the 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.