From: Marcelo Tosatti on
On Thu, Jul 01, 2010 at 09:55:56PM +0800, Xiao Guangrong wrote:
> Combine guest pte read between guest pte walk and pte prefetch
> Signed-off-by: Xiao Guangrong <xiaoguangrong(a)>
> ---
> arch/x86/kvm/paging_tmpl.h | 48 ++++++++++++++++++++++++++++++-------------
> 1 files changed, 33 insertions(+), 15 deletions(-)

Can't do this, it can miss invlpg:

vcpu0 vcpu1
read guest ptes
modify guest pte
instantiate stale
guest pte

See how the pte is reread inside fetch with mmu_lock held.

Otherwise the patchset looks fine to me.

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