On 02/21/2012 11:51 AM, Andrew Lutomirski wrote: >> >> No, that wouldn't help. The situation is actually quite similar to the >> current situation where we have an unshared fourth level, but since the >> fourth entries are 512G per entry, we would have to push unsharing of >> the kernel address space at least one more level (1G), possibly two >> (2M). Painful. >> >> The main advantage of a separate cr3 would be that we wouldn't need the >> unshared top level for the kernel side. > > Also, as is, if the top level wants to be per-cpu *and* per-task, > that's a big explosion of page tables that all need to stay in sync. > Fair enough. -hpa -- 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
