This is not true (unless there is a bug): Migration logging is tracked
via KVMState::migration_log and vga logging via KVMSlot::flags. Both are
merged in kvm_set_user_memory_region. Thus no such change is required
for upstream.
Jiffies doesn't sample any hardware; instead, a timer interrupt causes a
counter to be incremented, and that counter is sampled. The downside is
that clock granularity is very low - you can't use it for accurate timing.
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
--
