On Fri, Sep 23, 2022 at 4:20 PM Marc Zyngier <maz@xxxxxxxxxx> wrote:
> > > This is only a partial fix as the userspace side also need upgrading.
> >
> > Paolo has one fix 4802bf910e ("KVM: dirty ring: add missing memory
> > barrier", 2022-09-01) which has already landed.
>
> What is this commit? It doesn't exist in the kernel as far as I can see.
That's the load_acquire in QEMU, and the store_release part is in 7.2
as well (commit 52281c6d11, "KVM: use store-release to mark dirty
pages as harvested", 2022-09-18).
So all that QEMU is missing is the new capability.
Paolo
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