From: "Andi Kleen" Signed-off-by: Andi Kleen Signed-off-by: Andrew Morton --- Documentation/x86_64/boot-options.txt | 10 ++++++---- 1 files changed, 6 insertions(+), 4 deletions(-) diff -puN Documentation/x86_64/boot-options.txt~x86_64-some-updates-for-boot-optionstxt Documentation/x86_64/boot-options.txt --- devel/Documentation/x86_64/boot-options.txt~x86_64-some-updates-for-boot-optionstxt 2005-07-27 12:36:19.000000000 -0700 +++ devel-akpm/Documentation/x86_64/boot-options.txt 2005-07-27 12:36:19.000000000 -0700 @@ -47,7 +47,7 @@ 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 - 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 @@ -74,6 +74,9 @@ 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. + 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 @@ -178,6 +181,5 @@ Debugging 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. _