Red Hat Bugzilla – Bug 233971
HVM guest hangs on vcpu migration (ptc.ga emulation bug)
Last modified: 2013-07-03 09:30:48 EDT
Description of problem:
When a HVM guest migrates to the local CPU on ia64, smp_call_function_single()
doesn't work. Upstream has moved to using ptc_ga_remote_func() directly instead
in the xen-ia64-unstable tree.
Version-Release number of selected component (if applicable):
Variable. This is reportedly easily reproduced with a Windows guest by
repeatedly connecting/disconnecting RDP (remote desktop) sessions. Will update
this BZ if/when we have better steps to reproduce.
Steps to Reproduce:
1. Start a HVM guest
2. In the guest, cause frequent vcpu migration
Eventually HVM guest will hang
HVM guest does not hang
xen-ia64-unstable changeset with smp_call_function_single() ->
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
Need devel and QA ACKs before we can request an exception.
QE ack for RHEL 5.1
You can download this test kernel from http://people.redhat.com/dzickus/el5
QE ACK per comment #6 assumes Fujitsu will test.
change QA contact
Fujitsu's feedback of testing on EL5.1 beta is good.
5.1 beta is OK. The test passed.
Status set to: Next Update
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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,
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if the solution does not work for you.