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SubjectRe: [PATCH 0/18][RFC] Nested Paging support for Nested SVM (aka NPT-Virtualization)
On 03/03/2010 09:12 PM, Joerg Roedel wrote:
> Hi,
>
> here are the patches that implement nested paging support for nested
> svm. They are somewhat intrusive to the soft-mmu so I post them as RFC
> in the first round to get feedback about the general direction of the
> changes. Nevertheless I am proud to report that with these patches the
> famous kernel-compile benchmark runs only 4% slower in the l2 guest as
> in the l1 guest when l2 is single-processor. With SMP guests the
> situation is very different. The more vcpus the guest has the more is
> the performance drop from l1 to l2.
> Anyway, this post is to get feedback about the overall concept of these
> patches. Please review and give feedback :-)
>
> Thanks,
>
> Joerg
>
> Diffstat:
>
> arch/x86/include/asm/kvm_host.h | 21 ++++++
> arch/x86/kvm/mmu.c | 152 ++++++++++++++++++++++++++++++---------
> arch/x86/kvm/mmu.h | 2 +
> arch/x86/kvm/paging_tmpl.h | 81 ++++++++++++++++++---
> arch/x86/kvm/svm.c | 126 +++++++++++++++++++++++++++-----
> arch/x86/kvm/vmx.c | 9 +++
> arch/x86/kvm/x86.c | 19 +++++-
> include/linux/kvm.h | 1 +
> include/linux/kvm_host.h | 5 ++
> 9 files changed, 354 insertions(+), 62 deletions(-)
>

Okay, this looks excellent overall, it's nice to see how well this fits
with the existing mmu infrastructure (only ~300 lines added). The
performance results are impressive.

--
error compiling committee.c: too many arguments to function



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