| Chris Metcalf | 867e359 | 2010-05-28 23:09:12 -0400 | [diff] [blame] | 1 | menu "Kernel hacking" |
| 2 | |
| 3 | source "lib/Kconfig.debug" |
| 4 | |
| 5 | config EARLY_PRINTK |
| David Rientjes | 6a108a1 | 2011-01-20 14:44:16 -0800 | [diff] [blame] | 6 | bool "Early printk" if EXPERT && DEBUG_KERNEL |
| Chris Metcalf | 867e359 | 2010-05-28 23:09:12 -0400 | [diff] [blame] | 7 | default y |
| 8 | help |
| 9 | Write kernel log output directly via the hypervisor console. |
| 10 | |
| 11 | This is useful for kernel debugging when your machine crashes very |
| 12 | early before the console code is initialized. For normal operation |
| 13 | it is not recommended because it looks ugly and doesn't cooperate |
| 14 | with klogd/syslogd. You should normally N here, |
| 15 | unless you want to debug such a crash. |
| 16 | |
| 17 | config DEBUG_STACKOVERFLOW |
| 18 | bool "Check for stack overflows" |
| 19 | depends on DEBUG_KERNEL |
| 20 | help |
| 21 | This option will cause messages to be printed if free stack space |
| 22 | drops below a certain limit. |
| 23 | |
| 24 | config DEBUG_STACK_USAGE |
| 25 | bool "Stack utilization instrumentation" |
| 26 | depends on DEBUG_KERNEL |
| 27 | help |
| 28 | Enables the display of the minimum amount of free stack which each |
| 29 | task has ever had available in the sysrq-T and sysrq-P debug output. |
| 30 | |
| 31 | This option will slow down process creation somewhat. |
| 32 | |
| 33 | config DEBUG_EXTRA_FLAGS |
| 34 | string "Additional compiler arguments when building with '-g'" |
| 35 | depends on DEBUG_INFO |
| 36 | default "" |
| 37 | help |
| 38 | Debug info can be large, and flags like |
| 39 | `-femit-struct-debug-baseonly' can reduce the kernel file |
| 40 | size and build time noticeably. Such flags are often |
| 41 | helpful if the main use of debug info is line number info. |
| 42 | |
| 43 | endmenu |