diff options
Diffstat (limited to 'arch/s390/Kconfig.debug')
| -rw-r--r-- | arch/s390/Kconfig.debug | 34 |
1 files changed, 26 insertions, 8 deletions
diff --git a/arch/s390/Kconfig.debug b/arch/s390/Kconfig.debug index 4599fa06bd8..c56878e1245 100644 --- a/arch/s390/Kconfig.debug +++ b/arch/s390/Kconfig.debug @@ -1,17 +1,35 @@ menu "Kernel hacking" config TRACE_IRQFLAGS_SUPPORT - bool - default y + def_bool y source "lib/Kconfig.debug" -config DEBUG_PAGEALLOC - bool "Debug page memory allocations" +config STRICT_DEVMEM + def_bool y + prompt "Filter access to /dev/mem" + ---help--- + This option restricts access to /dev/mem. If this option is + disabled, you allow userspace access to all memory, including + kernel and userspace memory. Accidental memory access is likely + to be disastrous. + Memory access is required for experts who want to debug the kernel. + + If you are unsure, say Y. + +config S390_PTDUMP + bool "Export kernel pagetable layout to userspace via debugfs" depends on DEBUG_KERNEL - help - Unmap pages from the kernel linear mapping after free_pages(). - This results in a slowdown, but helps to find certain types of - memory corruptions. + select DEBUG_FS + ---help--- + Say Y here if you want to show the kernel pagetable layout in a + debugfs file. This information is only useful for kernel developers + who are working in architecture specific areas of the kernel. + It is probably not a good idea to enable this feature in a production + kernel. + If in doubt, say "N" +config DEBUG_SET_MODULE_RONX + def_bool y + depends on MODULES endmenu |