Andy Lutomirski <[email protected]> writes: > On Tue, May 5, 2020 at 7:14 AM Thomas Gleixner <[email protected]> wrote: >> >> Context tracking for KVM happens way too early in the vcpu_run() >> code. Anything after guest_enter_irqoff() and before guest_exit_irqoff() >> cannot use RCU and should also be not instrumented. >> >> The current way of doing this covers way too much code. Move it closer to >> the actual vmenter/exit code. > > Now you've made me wonder what happens if someone traces > vmx_vcpu_run(). I'm not sure I really want to think about this.
Been there, done that. Kinda worked but adding a kprobe into the guts of it made it go sideways very fast.
