* Peter Zijlstra: > On Mon, Jan 31, 2022 at 10:19:09PM +0100, Florian Weimer wrote: >> It can be used to implement getcpu purely in userspace, too. I had >> plan to hack this together with a node ID cache in TLS, which should >> offer pretty much the same functionality (except for weird CPU >> topology changes which alter the node ID of a previously used CPU). > > PowerPC does that quite a lot.. How so? Why make it especially hard for userspace?
