Re: [kvm PATCH v6 0/2] shrink vcpu_vmx down to order 2

[Sean Christopherson <seanjc@google.com>]

On Mon, May 24, 2021, Jim Mattson wrote:
> On Mon, May 24, 2021 at 3:44 PM Sean Christopherson <seanjc@google.com> wrote:
> >
> > On Mon, May 24, 2021, Paolo Bonzini wrote:
> > > On 21/05/21 22:58, Jim Mattson wrote:
> > > > On Wed, Oct 31, 2018 at 4:49 PM Marc Orr <marcorr@google.com> wrote:
> > > > >
> > > > > Compared to the last version, I've:
> > > > > (1) dropped the vmalloc patches
> > > > > (2) updated the kmem cache for the guest_fpu field in the kvm_vcpu_arch
> > > > >      struct to be sized according to fpu_kernel_xstate_size
> > > > > (3) Added minimum FPU checks in KVM's x86 init logic to avoid memory
> > > > >      corruption issues.
> > > > >
> > > > > Marc Orr (2):
> > > > >    kvm: x86: Use task structs fpu field for user
> > > > >    kvm: x86: Dynamically allocate guest_fpu
> > > > >
> > > > >   arch/x86/include/asm/kvm_host.h | 10 +++---
> > > > >   arch/x86/kvm/svm.c              | 10 ++++++
> > > > >   arch/x86/kvm/vmx.c              | 10 ++++++
> > > > >   arch/x86/kvm/x86.c              | 55 ++++++++++++++++++++++++---------
> > > > >   4 files changed, 65 insertions(+), 20 deletions(-)
> > > > >
> > > > > --
> > > >
> > > > Whatever happened to this series?
> > >
> > > There was a question about the usage of kmem_cache_create_usercopy, and a v7
> > > was never sent.
> >
> > What's that go to do with anything? :-D
> >
> >   b666a4b69739 ("kvm: x86: Dynamically allocate guest_fpu")
> >   240c35a3783a ("kvm: x86: Use task structs fpu field for user")
> 
> So, that's what the series was trimmed down to. Thanks!
> 
> Did we still manage to get down to order 2?

Yep, almost made it to order-1!

Current size (without 8 bytes from CONFIG_HYPERV=y) is 9728.