>> Does the new code now send SIGBUS(BUS_MCEERR_AO) to all the other threads >> of a multi-threaded process? > > No, it doesn't. This patch should not change anything for Action Optional > case, and find_early_kill_thread() chooses one thread per process, so > SIGBUS(BUS_MCEERR_AO) (as well as SIGBUS(BUS_MCEERR_AR)) should be sent only > to the chosen thread. Ok. I think I see it now. Acked-by: Tony Luck <tony.luck@xxxxxxxxx> -Tony