On Wed, Jan 21, 2015 at 06:39:47PM +0000, Marc Zyngier wrote: > Let's assume a guest has created an uncached mapping, and written > to that page. Let's also assume that the host uses a cache-coherent > IO subsystem. Let's finally assume that the host is under memory > pressure and starts to swap things out. > > Before this "uncached" page is evicted, we need to make sure > we invalidate potential speculated, clean cache lines that are > sitting there, or the IO subsystem is going to swap out the > cached view, loosing the data that has been written directly > into memory. > > Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx> Reviewed-by: Christoffer Dall <christoffer.dall@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
