2014-12-02 19:45+0100, Paolo Bonzini: > On 02/12/2014 18:33, Radim Krčmář wrote: > >> > + while (start < end) { > >> > + slot = start + (end - start) / 2; > >> > + > >> > + if (gfn >= memslots[slot].base_gfn) > > (Even thought division is costly, I think that checking here if 'slot' > > is the one we want wouldn't help very much.) > > > > Division by an unsigned is just a right shift. Division by signed > integer is a right shift + conditional move. We can change / 2 to > explicit >> 1, or change start and end to unsigned, or both. My bad, no respectable optimizer would miss that. -- 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