Re: Make 2.5.17 TLB even more friendlier

[Paul Mackerras <paulus@samba.org>]

David S. Miller writes:

> The next part is allowing for a "full_mm_flush" state such that
> tlb_flush() can make decisions based upon that.  Then we move
> the tlb_{start,end}_vma() invocations one level up.  So for
> the exit_mmap case it is:
> 
> 	tlb_gather_mmu(mm, 1);
> 
> 	flush_cache_mm(mm);
> 
> 	for each vma {
> 		...
> 		unmap_page_range(...);
> 	}
> 
> 	clear_page_tables();
> 	tlb_finish_mmu();

I still need tlb_end_vma in this case - or at least I need a hook
that gets called after all the tlb_remove_tlb_entry calls are done but
before clear_page_tables is called.  If I had that hook (called in
both the exit_mmap and unmap cases) then I would not need the
tlb_start/end_vma hooks.

Regards,
Paul.