> > This change seems to not related to what you try to fix. > > Could this break some other workloads like copying from user address? > > > > Yes, this move MCE_IN_KERNEL_COPYIN set into next case, both COPY and > MCE_SAFE type will set MCE_IN_KERNEL_COPYIN, for EX_TYPE_COPY, we don't > break it. Should Linux even try to take a core dump for a SIGBUS generated because the application accessed a poisoned page? It doesn't seem like it would be useful. Core dumps are for debugging s/w program errors in applications and libraries. That isn't the case when there is a poison consumption. The application did nothing wrong. This patch is still useful though. There may be an undiscovered poison page in the application. Avoiding a kernel crash when dumping core is still a good thing. -Tony
