On 08/26/2010 08:15 AM, Avi Kivity wrote:
On 08/25/2010 03:55 PM, Anthony Liguori wrote:
Maybe we can merge the patches.
As for your patch, I have some comment.
- bus itself may want its own handler. At lease pci bus needs it.
And propagating reset signal to children is up to the bus
controller.
I disagree. Reset should be equivalent to power off + init and it's
not something that can be selectively propagated.
Not all busses propagate reset - SCSI is an example (I think).
We're talking about cold reset vs. warm reset.
In the absence of passthrough, I'm struggling to see a useful use-case
with warm reset. However, there are many useful things we can do
assuming a cold reset (like MADV_DONTNEED memory on reboot).
That's not saying we shouldn't do a warm reset, but I'd like to see that
as an incremental addition to what we have today (like introducing a
propagating warm reset callback) and thinking through what the actual
behavior should and shouldn't be.
Regards,
Anthony Liguori
