On Thu, Jan 20, 2011 at 02:41:46PM +0100, Peter Zijlstra wrote: > On Thu, 2011-01-20 at 17:29 +0530, Srivatsa Vaddagiri wrote: > > > > If we had a yield-to [1] sort of interface _and_ information on which vcpu > > owns a lock, then lock-spinners can yield-to the owning vcpu, > > and then I'd nak it for being stupid ;-) > > really, yield*() is retarded, never even consider using it. If you've > got the actual owner you can do full blown PI, which is tons better than > a 'do-something-random' call.
Yes definitely that would be much better than yield-to. > The only reason the whole non-virt pause loop filtering muck uses it is > because it really doesn't know anything, and do-something is pretty much > all it can do. Its a broken interface. - vatsa -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
