diff options
Diffstat (limited to 'lib/Kconfig.debug')
| -rw-r--r-- | lib/Kconfig.debug | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 396c38b3cb69..7d16e6433302 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 |