Merge master.kernel.org:/pub/scm/linux/kernel/git/aegl/linux-2.6

[linux-2.6] / Documentation / x86_64 / boot-options.txt

diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt
index b9e6be00cadfbc1f2e767076c467ccb6f6ad28e6..678e8f192db2917c741ca0b88ddc97f761a4a8d7 100644 (file)
--- a/Documentation/x86_64/boot-options.txt
+++ b/Documentation/x86_64/boot-options.txt
@@ -6,6 +6,11 @@ only the AMD64 specific ones are listed here.
 Machine check
 
    mce=off disable machine check
 Machine check
 
    mce=off disable machine check

+   mce=bootlog Enable logging of machine checks left over from booting.
+               Disabled by default because some BIOS leave bogus ones.
+               If your BIOS doesn't do that it's a good idea to enable though
+               to make sure you log even machine check events that result
+               in a reboot.

 
    nomce (for compatibility with i386): same as mce=off
 
 
    nomce (for compatibility with i386): same as mce=off
 


@@ -47,7 +52,7 @@ Timing
   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
   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
 
   report_lost_ticks
   Report when timer interrupts are lost because some code turned off


@@ -74,6 +79,9 @@ Idle loop
   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.
   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
 
 
 Rebooting
 


@@ -178,6 +186,5 @@ Debugging
 Misc
 
   noreplacement  Don't replace instructions with more appropiate ones
 Misc
 
   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.
-
+                for the CPU. This may be useful on asymmetric MP systems
+                where some CPU have less capabilities than the others.