Hello, Wei. On Fri, Feb 17, 2017 at 10:12:31PM +0800, Wei Yang wrote: > > And compare the ruling with the iteration for the loop to be (1UL << > > 5) and (1UL << 19). > > The runtime is 0.00s and 0.04s respectively. The absolute value is not much. systemd-analyze usually does a pretty good job of breaking down which phase took how long. It might be worthwhile to test whether the improvement is actually visible during the boot. > >> * Do we really need to add full reverse iterator to just get the > >> highest section number? > >> > > > > You are right. After I sent out the mail, I realized just highest pfn > > is necessary. That said, getting efficient is always great as long as the added complexity is justifiably small enough. If you can make the change simple enough, it'd be a lot easier to merge. Thanks. -- tejun -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
