* Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > On Mon, 29 Jun 2009 19:20:53 -0400 (EDT) > Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx> wrote: > > > On Wed, 24 Jun 2009, Andrew Morton wrote: > > > > > I assume from the tremendous number of > > > for_each_possible_cpu()s that CPU hotplug awareness won't be > > > happening. > > > > Per cpu areas are allocated for all possible processors. No need > > to handle offlining and onlining them. > > Well yes. My point is that this is a bug-not-a-feature ;) Yeah, it's a bug for something like a virtual environment which boots generic kernels that might have 64 possible CPUs (on a true 64-way system), but which will have fewer in practice. It's pretty basic stuff: the on-demand allocation of percpu resources. 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
