On Sun, Jul 29, 2012 at 10:03:45PM +0200, Paolo Bonzini wrote: > Il 29/07/2012 22:00, Michael S. Tsirkin ha scritto: > > I've been looking at adding caching for IRQs so that we don't need to > > scan all VCPUs on each interrupt. One issue I had a problem with, is > > how the cache structure can be used from both a thread (to fill out the > > cache) and interrupt (to actually send if cache is valid). > > > > For now just added a lock field in the cache so we don't need to worry > > about this, and with such a lock in place we don't have to worry about > > RCU as cache can be invalidated simply under this lock. > > seqlock? > > Paolo AFAIK seqlock only works if uses of stale data have no side-effects, this is not the case here. We could use an rwlock I think. -- MST -- 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
