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authorAndi Kleen <ak@suse.de>2005-07-29 00:15:34 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-29 00:45:59 -0400
commitef4d7cbea773a77b36e732779cab4018ba2c037b (patch)
treec9aeb9e716ee2d83204724d6e2baa2b2e81caf0e /Documentation
parenta54649b801e5fe69755dc55e6589f7a65af25d79 (diff)
[PATCH] x86_64: Some updates for boot-options.txt
Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/x86_64/boot-options.txt10
1 files changed, 6 insertions, 4 deletions
diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt
index b9e6be00cadf..476c0c22fbb7 100644
--- a/Documentation/x86_64/boot-options.txt
+++ b/Documentation/x86_64/boot-options.txt
@@ -47,7 +47,7 @@ Timing
47 notsc 47 notsc
48 Don't use the CPU time stamp counter to read the wall time. 48 Don't use the CPU time stamp counter to read the wall time.
49 This can be used to work around timing problems on multiprocessor systems 49 This can be used to work around timing problems on multiprocessor systems
50 with not properly synchronized CPUs. Only useful with a SMP kernel 50 with not properly synchronized CPUs.
51 51
52 report_lost_ticks 52 report_lost_ticks
53 Report when timer interrupts are lost because some code turned off 53 Report when timer interrupts are lost because some code turned off
@@ -74,6 +74,9 @@ Idle loop
74 event. This will make the CPUs eat a lot more power, but may be useful 74 event. This will make the CPUs eat a lot more power, but may be useful
75 to get slightly better performance in multiprocessor benchmarks. It also 75 to get slightly better performance in multiprocessor benchmarks. It also
76 makes some profiling using performance counters more accurate. 76 makes some profiling using performance counters more accurate.
77 Please note that on systems with MONITOR/MWAIT support (like Intel EM64T
78 CPUs) this option has no performance advantage over the normal idle loop.
79 It may also interact badly with hyperthreading.
77 80
78Rebooting 81Rebooting
79 82
@@ -178,6 +181,5 @@ Debugging
178Misc 181Misc
179 182
180 noreplacement Don't replace instructions with more appropiate ones 183 noreplacement Don't replace instructions with more appropiate ones
181 for the CPU. This may be useful on asymmetric MP systems 184 for the CPU. This may be useful on asymmetric MP systems
182 where some CPU have less capabilities than the others. 185 where some CPU have less capabilities than the others.
183