* Tejun Heo <tj@xxxxxxxxxx> wrote: > Hello, Christoph. > > Christoph Lameter wrote: > > I looked at allocating for online cpus only a couple of years > > back but at that per cpu state was kept for offlined cpus in per > > cpu areas. There are numerous assumptions in per cpu handling > > all over the kernel that a percpu area is always available. > > The plan is to allocate and keep percpu areas for cpus which have > ever been up. There'll be no taking down of percpu areas. > Conversion from possible to has_ever_been_up should be much easier > than possible -> online. State keeping will work fine too. That sounds like a very sane plan. Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
