Red Hat Bugzilla – Bug 625903
[Xen] backport hardware task switching for HVM guests
Last modified: 2011-01-13 16:12:35 EST
Windows sends NMI using a task gate. This needs to be backported to Xen.
Created attachment 441435 [details]
simple reproducer for 32-bit Linux guests
To reproduce under a RHEL5.5 Linux guest:
1) place the attached file into the guest's file system
2) install kernel-headers
3) Run the following commands:
4) The guest should hang and not reset. xm dmesg should _not_ mention a triple fault.
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
Created attachment 441986 [details]
patch series to fix the bug
on top of the patches for 625902
You can download this test kernel from http://people.redhat.com/jwilson/el5
Detailed testing feedback is always welcomed.
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.