On Wed, Jul 02, 2014 at 05:00:36PM +0800, Tang Chen wrote: > ept identity pagetable is pinned in memory, and as a result it cannot be > migrated/hot-removed. > > But actually it doesn't need to be pinned in memory. > > This patch introduces a new vcpu request: KVM_REQ_MIGRATE_EPT to reset ept > indetity pagetable related variable. This request will be made when > kvm_mmu_notifier_invalidate_page() is called when the page is unmapped > from the qemu user space to reset kvm->arch.ept_identity_pagetable to NULL. > And will also be made when ept violation happens to reset > kvm->arch.ept_identity_pagetable to the new page. kvm->arch.ept_identity_pagetable is never used as a page address, just boolean null/!null to see if identity pagetable is initialized. I do not see why would we want to track its address at all. Changing it to bool and assigning true during initialization should be enough. -- Gleb. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
