> From: Paolo Bonzini [mailto:pbonz...@redhat.com] > On 19/01/2015 14:01, Pavel Dovgaluk wrote: > > > It would be easier if you pointed me to actual code in the series. But > > > this doesn't seem impossible to fix by atomically writing the 'E' and > > > 'A' in the same critical section. > > > > Because 'A' is written only inside some of the replay_run_event callbacks. > > It depends on type of the event and it's processing function inside the > > QEMU core. > > There could be no 'A' at all. > > Why can't that code write the 'E' as well?
Because such callbacks do not know that they are called from record/replay event. They may be called from record/replay code and from other parts of QEMU. And they may write save something low-level like timer request. Pavel Dovgalyuk
