On 12/06/2010 10:30 AM, Avi Kivity wrote:
On 12/06/2010 06:21 PM, Anthony Liguori wrote:
No, right now we intercept SHUTDOWN (and turn it back, in qemu, into
a RESET), and we emulate all the SIPI stuff. We also intercepted
HLT so we couldn't get that activity state either.
Ok, looks like I need to make this per-VM and use a CAP along with an
interface to enable it to ensure that userspace to ensure it gets
saved/restored appropriately. I'll rework it.
Not really, it's not any different from the ordinary intercepted HLT.
Put the halted state where we currently put it (hint: nowhere), and
all is fine.
So we have a minor bug that we don't save/restore HLT state (either
emulated or "real" with your patch), that causes a spurious wakeup
after live migration.
Fair enough. I certainly likes fixes that do nothing :-)
Note for your respin, yield_on_hlt became __read_often again, so
please make it __read_mostly.
Done.
Regards,
Anthony Liguori
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