Il 11/09/2014 13:30, Gleb Natapov ha scritto: >> > + vmcs_write64(APIC_ACCESS_ADDR, page_to_phys(page)); >> > + /* >> > + * Do not pin apic access page in memory so that memory >> > + * hotplug process is able to migrate it. >> > + */ >> > + put_page(page); >> > } > This code is in prepare_vmcs02() and is executed during L1->L2 vmentry. What happens > when apic access page is migrated while L2 is running? It needs to be update somewhere. Before it is migrated, the MMU notifier is called and will force a vmexit on all CPUs. The reload code will call GUP again on the page again and swap it in. Paolo -- 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
