From: Bob Picco <bpicco@xxxxxxxxxx> Date: Tue, 16 Sep 2014 09:26:47 -0400 I just looked into this a bit while reviewing this patch. > A more recent one is an ITLB issue with a bad pagesize which could > be a hardware bug. The error is signalled solely by the hypervisor. Let's look at the PTE it doesn't like. > This is recent mainline for ITLB: > [ 3708.179864] SUN4V-ITLB: TPC<0xfffffc010071cefc> > [ 3708.188866] SUN4V-ITLB: O7[fffffc010071cee8] > [ 3708.197377] SUN4V-ITLB: O7<0xfffffc010071cee8> > [ 3708.206539] SUN4V-ITLB: vaddr[e0003] ctx[1a3c] pte[2900000dcc800eeb] error[4] Indeed bad pagesize is signalled. The page size bits are in the low 3 bits of the PTE, which here is 0x3 which should encode a 4MB page. However I notice that 0x8 is set, which is a reserved bit. That shouldn't happen, and could be what the hypervisor really doesn't like. -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
