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authorRandy Dunlap <randy.dunlap@oracle.com>2007-05-23 13:58:16 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-23 20:14:15 -0700
commit3d6ac9843175c1d29c075794519cb045b52e46c2 (patch)
tree99c7b313497fa39bf103afa344d06d1c01e92f65 /Documentation
parent53a2731f9310a66beaf55677229ab067c85ce4fa (diff)
document clocksources
Document the available clocksources per platform and move clocksource= into the correct (alpha) location in the file. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/kernel-parameters.txt24
1 files changed, 20 insertions, 4 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 09220a1e22d..aae2282600c 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -396,6 +396,26 @@ and is between 256 and 4096 characters. It is defined in the file
clocksource is not available, it defaults to PIT.
Format: { pit | tsc | cyclone | pmtmr }
+ clocksource= [GENERIC_TIME] Override the default clocksource
+ Format: <string>
+ Override the default clocksource and use the clocksource
+ with the name specified.
+ Some clocksource names to choose from, depending on
+ the platform:
+ [all] jiffies (this is the base, fallback clocksource)
+ [ACPI] acpi_pm
+ [ARM] imx_timer1,OSTS,netx_timer,mpu_timer2,
+ pxa_timer,timer3,32k_counter,timer0_1
+ [AVR32] avr32
+ [IA-32] pit,hpet,tsc,vmi-timer;
+ scx200_hrt on Geode; cyclone on IBM x440
+ [MIPS] MIPS
+ [PARISC] cr16
+ [S390] tod
+ [SH] SuperH
+ [SPARC64] tick
+ [X86-64] hpet,tsc
+
code_bytes [IA32] How many bytes of object code to print in an
oops report.
Range: 0 - 8192
@@ -1807,10 +1827,6 @@ and is between 256 and 4096 characters. It is defined in the file
time Show timing data prefixed to each printk message line
- clocksource= [GENERIC_TIME] Override the default clocksource
- Override the default clocksource and use the clocksource
- with the name specified.
-
tipar.timeout= [HW,PPT]
Set communications timeout in tenths of a second
(default 15).