On Wed, Jan 13, 2021 at 7:15 PM Oscar Salvador <[email protected]> wrote: > > On Wed, Jan 13, 2021 at 07:11:06PM +0800, Muchun Song wrote: > > If there is no task to be scheduled. Here is just a while loop. > > The cpu_relax is a good thing to insert into busy-wait loops, > > right? > > But if the race window is that small, does it make sense?
Actually, there is one exception. The race window could become larger. If the page is freed via a workqueue (see free_huge_page()). In this case, the cpu_relax() can make sense. Right? > > -- > Oscar Salvador > SUSE L3
