Certain options are not editable when running make menuconfig?

aljordan · 11-03-2009, 08:03 AM

Hi,

I am compiling a realtime kernel from source. When I run make menuconfig or make gconfig, certain options that I don't want to set are set but not editable. Specifically, I am trying to disable FTRACE and KALLSYMS, but neither are editable. I have EXPERIMENTAL set.

I imagine they must not be editable for a reason, but I am considering editing the config file by hand to disable these options. I don't know if that is a good or bad idea.

Does anyone have any thoughts as to why they are not changeable?

Thank you,
Alan

cladisch · 11-03-2009, 09:02 AM

The help text of an option shows what other option(s) force this one to be enabled/disabled.
In your case, it's likely to be EMBEDDED.

aljordan · 11-03-2009, 11:08 AM

Quote:

Originally Posted by cladisch

The help text of an option shows what other option(s) force this one to be enabled/disabled.
In your case, it's likely to be EMBEDDED.

Unfortunately that information doesn't exist in the help text, and EMBEDDED is not the parent.

Thanks,
Alan

cladisch · 11-03-2009, 11:52 AM

Quote:

Unfortunately that information doesn't exist in the help text, and EMBEDDED is not the parent.

Help texts:

Code:

CONFIG_KALLSYMS:

Say Y here to let the kernel print out symbolic crash information and
symbolic stack backtraces. This increases the size of the kernel
somewhat, as all symbols have to be loaded into the kernel image.

Symbol: KALLSYMS [=y]
Prompt: Load all symbols for debugging/ksymoops
  Defined at init/Kconfig:771
  Depends on: EMBEDDED [=y]
  Location:
    -> General setup
      -> Configure standard kernel features (for small systems) (EMBEDDED [=y])
  Selected by: DEBUG_KMEMLEAK [=n] && DEBUG_KERNEL [=y] && EXPERIMENTAL [=y] && !MEMORY_HO...

Code:

CONFIG_FTRACE:

Enable the kernel tracing infrastructure.

Symbol: FTRACE [=y]
Prompt: Tracers
  Defined at kernel/trace/Kconfig:118
  Depends on: TRACING_SUPPORT [=y]
  Location:
    -> Kernel hacking

aljordan · 11-03-2009, 01:07 PM

Hi,

When I run make gconfig and select kallsyms, only the first paragraph of the text you posted is listed in the GUI. Where are you looking to find the more complete information?

Thanks,
Alan

cladisch · 11-04-2009, 05:20 AM

make menuconfig