On 9/17/18 9:30 AM, Emilio G. Cota wrote: > cpu_reset(cs); > - cs->interrupt_request = sipi; > + atomic_mb_set(&cs->interrupt_request, sipi); > memcpy(&env->start_init_save, &save->start_init_save, Why does this need a memory barrier? Anyway, I think a bare mechanical conversion would be best for the first patch and then extra barriers added separately and with a description of why. r~