[PATCH] x86_64: Some updates for boot-options.txt

  notsc

  Don't use the CPU time stamp counter to read the wall time.

  This can be used to work around timing problems on multiprocessor systems

  with not properly synchronized CPUs. Only useful with a SMP kernel

  with not properly synchronized CPUs.

  report_lost_ticks

  Report when timer interrupts are lost because some code turned off

  event. This will make the CPUs eat a lot more power, but may be useful

  to get slightly better performance in multiprocessor benchmarks. It also

  makes some profiling using performance counters more accurate.

  Please note that on systems with MONITOR/MWAIT support (like Intel EM64T

  CPUs) this option has no performance advantage over the normal idle loop.

  It may also interact badly with hyperthreading.

Rebooting

  noreplacement  Don't replace instructions with more appropiate ones

		 for the CPU. This may be useful on asymmetric MP systems

		 where some CPU have less capabilities than the others.