Re: [PATCH v3 07/15] KVM: MMU: introduce nulls desc

Avi Kivity
2013-11-25T12:48:40Z

On Mon, Nov 25, 2013 at 8:11 AM, Xiao Guangrong
<xiaoguangrong@linux.vnet.ibm.com> wrote:
>
> On Nov 23, 2013, at 3:14 AM, Marcelo Tosatti <mtosatti@redhat.com> wrote:

<snip complicated stuff about parent_pte>

I'm not really following, but note that parent_pte predates EPT (and
the use of rcu in kvm), so all the complexity that is the result of
trying to pack as many list entries into a cache line can be dropped.
Most setups now would have exactly one list entry, which is handled
specially antyway.

Alternatively, the trick of storing multiple entries in one list entry
can be moved to generic code, it may be useful to others.