Re: [PATCH 0/2] remove kvm vmap usage

[Izik Eidus <ieidus@redhat.com>]

Izik Eidus wrote:
> Remove the vmap usage from kvm, this is needed both for ksm and
> get_user_pages != write.
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>   
Ok so for ksm things are now all right, actully i could live without 
this vmap as well,
beacuse ksm check the page _count and every call to gva_to_page should 
increase it.

anyway before i continue with the kmap removing (again ksm doesnt need 
it, only get_user_pages != write)
does we really want to go that way?

even for the get_user_pages case we can live with the write = 0, if 
before each kmap_atomic we will call
get_user_pages (write = 1), so the page inside apic_page and time_page 
and what so ever would be safe
(when ksm will come to merge that page it will skip it with the page 
count check)