commit b7c4145ba2eb0717db0ddac1b5f7f48012189c53
author Avi Kivity <avi@redhat.com> Thu Dec 02 17:52:50 2010 +0200
committer Avi Kivity <avi@redhat.com> Wed Jan 12 11:30:18 2011 +0200
tree 9b259970f56451ecb0f5d84ecd81d67386f63224
parent 4cc703100b1fd97c71804e2fa5c9c377c5b37dc5

KVM: Don't spin on virt instruction faults during reboot

Since vmx blocks INIT signals, we disable virtualization extensions during
reboot.  This leads to virtualization instructions faulting; we trap these
faults and spin while the reboot continues.

Unfortunately spinning on a non-preemptible kernel may block a task that
reboot depends on; this causes the reboot to hang.

Fix by skipping over the instruction and hoping for the best.

Signed-off-by: Avi Kivity <avi@redhat.com>