From http://permalink.gmane.org/gmane.comp.emulators.xen.devel/94955: > Guest vcpu may totally lose all ticks if the vlapic->pt.irq was not restored > during save/restore process. Fix it. This is upstream c/s 22470. No testcase, but the bug is present in our version of vlapic too.
Paolo posted http://post-office.corp.redhat.com/archives/rhkernel-list/2011-July/msg00609.html
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release.
Patch(es) available in kernel-2.6.18-282.el5 You can download this test kernel (or newer) from http://people.redhat.com/jwilson/el5 Detailed testing feedback is always welcomed.
Testing of this problem is covered by running acceptance/functional test with several Snapshot builds (from Snapshot1 to Snapshot4). No any problem found during the testing, marked it as Verified:SanityOnly.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHSA-2012-0150.html