Hello Edgar. My thought is that somehow, under NetBSD-10, interrupt routing for your svwsata device is not correct. I thought changes in the ACPI environment might account for that change, either because the new ACPI code sets up ioapic chips differently or because the interraction between the new ACPI code and the on-board BIOS has changed. For example, are the same devices sharing the same interrupts on both NetBSD-8 and NetBSD-10? Or, are there any interupts which are not routed to CPU0 on NetBSD-10? If there is interrupt sharing going on, particularly on the pin that's servicing the svwsata device, then I'd look at the drivers sharing that interrupt and see what's changed between the -8 system and the -10 system for those drivers. Additionally, I'd suggest checking to make sure you have the latest BIOS for the systems you upgraded to NetBSD-10, again, to address any changes in the ACPI code that have triggered latent bugs in the BIOS.
-Brian
