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powerpc: Allow the max stack trace depth to be configured

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On my screen, when something crashes, I only have space for maybe 16
functions of the stack trace before the information above it scrolls
off the screen.  It's easy to hack the kernel to print out only that
much, but it's harder to remember to do it.  This introduces a config
option for it so that I can keep the setting in my config.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Johannes Berg 2008-11-20 03:24:07 +00:00 committed by Paul Mackerras
parent 0186f47e70
commit c4d04be11f
2 changed files with 10 additions and 1 deletions
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9
arch/powerpc/Kconfig.debug
View file

@ -2,6 +2,15 @@ menu "Kernel hacking"
source "lib/Kconfig.debug"
config PRINT_STACK_DEPTH
int "Stack depth to print" if DEBUG_KERNEL
default 64
help
This option allows you to set the stack depth that the kernel
prints in stack traces. This can be useful if your display is
too small and stack traces cause important information to
scroll off the screen.
config DEBUG_STACKOVERFLOW
bool "Check for stack overflows"
depends on DEBUG_KERNEL

2
arch/powerpc/kernel/process.c
View file

@ -1000,7 +1000,7 @@ unsigned long get_wchan(struct task_struct *p)
return 0;
}
static int kstack_depth_to_print = 64;
static int kstack_depth_to_print = CONFIG_PRINT_STACK_DEPTH;
void show_stack(struct task_struct *tsk, unsigned long *stack)
{