X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=lib%2FKconfig.debug;h=c567f219191d590116bcdd4498349d72e62ce612;hb=2843483d2eb02ad104edbe8b2429fb6a39d25063;hp=396c38b3cb69f76f90b7882d45c448170eba8044;hpb=541010e4b8921cd781ff02ae68028501457045b6;p=powerpc.git

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 396c38b3cb..c567f21919 100644
--- 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.
 
+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
@@ -480,3 +498,5 @@ config FAULT_INJECTION_STACKTRACE_FILTER
 	select FRAME_POINTER
 	help
 	  Provide stacktrace filter for fault-injection capabilities
+
+source "samples/Kconfig"