On Fri, 5 Nov 2010, Masao Uebayashi wrote: > On Mon, Nov 01, 2010 at 03:52:11PM -0700, Matt Thomas wrote:
> > Indeed. Also consider that pmap's are designed to have to have > > fast V->P translations, using that instead of UVM makes a lot of > > sense. > > How does locking works? > > My understanding is page tables (per-process) are protected by > struct vm_map (per-process). (Or moving toward it.) No, once again this is MD. For instance sparc64 uses compare and swap instructions to manipulate page tables for lockless synchronization. Eduardo
