Il 20/11/2013 14:47, Alex Bligh ha scritto: > I think you are saying this sounds like another underlying bug > (no pause instruction) uncovered by the timer patches rather than > a bug in the timer patches. > > Reading > http://software.intel.com/file/27087 > perhaps the answer is for pause to yield the lock. > > However, what if an arbitrary guest foolishly /does/ do a tight > spinlock without calling pause?
It would be a problem. I don't think it has to be fixed though (and anyway of course not now). The fix could be to make TCG use "real" SMP instead of round-robin. Paolo
