I'm looking at x86 boot loaders, which consume 100% CPU at console (BIOS PC console), when running on hypervisors. Users usually boot kernel as soon as a boot loader is loaded. But when something wrong happens and boot loader prompt is entered, and if its console driver busily polls console, the problem appears. (At least it is a problem for my customer's use case.)
As far as I test on VMware ESXi 5.5, all of boot loaders of CentOS 6 (Grub 0.97), FreeBSD 10, and NetBSD 7 consume 100% CPU. All amd64, all PC (not COM) console. I'd like to hear tests on other situations - different hypervisors, different OSes, different versions, and different consoles (PC or COM). Thanks for your help.
