uml: throw out CHOOSE_MODE

[linux-2.6-omap-h63xx.git] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 396c38b3cb69f76f90b7882d45c448170eba8044..7d16e64333025db69440fe96b46beb229749e746 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -413,6 +413,24 @@ config FORCED_INLINING
          become the default in the future, until then this option is there to
          test gcc for this.
 
          become the default in the future, until then this option is there to
          test gcc for this.
 

+config BOOT_PRINTK_DELAY
+       bool "Delay each boot printk message by N milliseconds"
+       depends on DEBUG_KERNEL && PRINTK && GENERIC_CALIBRATE_DELAY
+       help
+         This build option allows you to read kernel boot messages
+         by inserting a short delay after each one.  The delay is
+         specified in milliseconds on the kernel command line,
+         using "boot_delay=N".
+
+         It is likely that you would also need to use "lpj=M" to preset
+         the "loops per jiffie" value.
+         See a previous boot log for the "lpj" value to use for your
+         system, and then set "lpj=M" before setting "boot_delay=N".
+         NOTE:  Using this option may adversely affect SMP systems.
+         I.e., processors other than the first one may not boot up.
+         BOOT_PRINTK_DELAY also may cause DETECT_SOFTLOCKUP to detect
+         what it believes to be lockup conditions.
+

 config RCU_TORTURE_TEST
        tristate "torture tests for RCU"
        depends on DEBUG_KERNEL
 config RCU_TORTURE_TEST
        tristate "torture tests for RCU"
        depends on DEBUG_KERNEL