Re: [PATCH 0/11] RFC: PCI using capabilitities

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On Sun, Dec 11, 2011 at 12:03:52PM +0200, Sasha Levin wrote:
> On Sun, 2011-12-11 at 11:05 +0200, Avi Kivity wrote:
> > mmios are strictly ordered.
> > 
> > Perhaps your printfs are reordered by buffering?  Are they from
> > different threads?  Are you using coalesced mmio (which is still
> > strictly ordered, if used correctly)? 
> 
> I print the queue_selector and queue_address in the printfs, even if
> printfs were reordered they would be printing the data right, unlike
> they do now. It's the data in the printfs that matters, not their order.
> 
> Same vcpu thread with both accesses.
> 
> Not using coalesced mmio.

Not sure why this would matter, but is the BAR a prefetcheable one?
Rusty's patch uses pci_iomap which maps a prefetcheable BAR
as cacheable.


> -- 
> 
> Sasha.
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