On Tue, Apr 13, 2021 at 10:47:21PM -0700, Jue Wang wrote: > This path is when EPT #PF finds accesses to a hwpoisoned page and > sends SIGBUS to user space (KVM exits into user space) with the same > semantic as if regular #PF found access to a hwpoisoned page. > > The KVM_X86_SET_MCE ioctl actually injects a machine check into the guest. > > We are in process to launch a product with MCE recovery capability in > a KVM based virtualization product and plan to expand the scope of the > application of it in the near future. Any pointers to code or is this all non-public? Any text on what that product does with the MCEs? > The in-memory database and analytical domain are definitely using it. > A couple examples: > SAP HANA - as we've tested and planned to launch as a strategic > enterprise use case with MCE recovery capability in our product > SQL server - https://support.microsoft.com/en-us/help/2967651/inf-sql-server-may-display-memory-corruption-and-recovery-errors Aha, so they register callbacks for the processes to exec on a memory error. Good to know, thanks for those. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
