> Can you point me at that SIGBUS code in a current kernel?
It is in kill_me_maybe(). mce_vaddr is setup when we disassemble whatever get_user()
or copy from user variant was in use in the kernel when the poison memory was consumed.
if (p->mce_vaddr != (void __user *)-1l) {
force_sig_mceerr(BUS_MCEERR_AR, p->mce_vaddr, PAGE_SHIFT);
Would it be any better if we used the BUS_MCEERR_AO code that goes into siginfo?
That would make it match up better with what happens when poison is found
asynchronously by the patrol scrubber. I.e. the semantics are:
AR: You just touched poison at this address and need to do something about that.
AO: Just letting you know that you have some poison at the address in siginfo.
-Tony
