+static void machine_check_under_kdump(struct pt_regs *regs, long error_code)
+{
+ if (mca_cfg.kdump_cpu == smp_processor_id())
+ pr_emerg("MCE triggered when kdumping. If you are lucky enough,
you will have a kdump. Otherwise, this is a dying message.\n");
I'm worried about the SRAR case here. Your code just returns, which will
trigger the same machine check again. The system will spin forever printing
this message.
I think you have to look at MCG_STATUS and scan the machine check banks to make
a choice. There are some simple cases:
MCG_STATUS.RIPV=0 -> cannot return (where will the cpu go - you have no idea!)
SRAO -> safe to just return
SRAR -> should not return
But the rest may require some thought. If there is a PCC=1 error, then you may
end up with a corrupt dump. Perhaps this case will already be covered by
RPIV==0?
-Tony
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