[lkml]   [2007]   [May]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH] use printk.time option, drop time/notime
From: Randy Dunlap <>

Andrew, please drop add-notime-boot-option.patch
and use this patch instead...

Allow printk_time to be enabled or disabled at boot time.
Previously it could be enabled only, but not disabled.

Change printk_time from an int to a bool since that's what it is.
Make its logical (exposed) name just be "time" (was "printk_time").

Note: Changes kernel boot option syntax from "time" to "printk.time=value".

Since printk_time is declared as a module_param, it can also be
changed at run-time by modifying
to a value of 1/Y/y to enabled it or 0/N/n to disable it.

Since printk_time is declared as a module_param, its value can also
be set at boot-time by using
linux printk.time=<bool>

Drop the "time" boot option and its __setup() functions.

Signed-off-by: Randy Dunlap <>
Documentation/kernel-parameters.txt | 5 +++--
kernel/printk.c | 12 +-----------
2 files changed, 4 insertions(+), 13 deletions(-)

--- linux-2622-rc2g5.orig/Documentation/kernel-parameters.txt
+++ linux-2622-rc2g5/Documentation/kernel-parameters.txt
@@ -1406,6 +1406,9 @@ and is between 256 and 4096 characters.
Ranges are in pairs (memory base and size).

+ printk.time= Show timing data prefixed to each printk message line
+ Format: <bool> (1/Y/y=enable, 0/N/n=disable)
profile= [KNL] Enable kernel profiling via /proc/profile
Format: [schedule,]<number>
Param: "schedule" - profile schedule points.
@@ -1805,8 +1808,6 @@ and is between 256 and 4096 characters.
thash_entries= [KNL,NET]
Set number of hash buckets for TCP connection

- 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.
--- linux-2622-rc2g5.orig/kernel/printk.c
+++ linux-2622-rc2g5/kernel/printk.c
@@ -449,17 +449,7 @@ static int printk_time = 1;
static int printk_time = 0;
-module_param(printk_time, int, S_IRUGO | S_IWUSR);
-static int __init printk_time_setup(char *str)
- if (*str)
- return 0;
- printk_time = 1;
- return 1;
-__setup("time", printk_time_setup);
+module_param_named(time, printk_time, bool, S_IRUGO | S_IWUSR);

__attribute__((weak)) unsigned long long printk_clock(void)
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at
 \ /
  Last update: 2007-05-25 02:13    [W:0.057 / U:1.564 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site