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SubjectRe: [PATCH v2 4/5] kernel hacking: new config DEBUG_EXPERIENCE to apply GCC -Og optimization
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On 05/02/2018 06:44 AM, changbin.du@intel.com wrote:
> From: Changbin Du <changbin.du@intel.com>
>

Sorry, I missed one:

> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index ab55801..e264199 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -216,6 +216,27 @@ config NO_AUTO_INLINE
>
> If unsure, select N.
>
> +config DEBUG_EXPERIENCE
> + bool "Optimize for better debugging experience (-Og)"
> + default n
> + select NO_AUTO_INLINE
> + depends on !CC_OPTIMIZE_FOR_SIZE
> + help
> + This will apply GCC '-Og' optimization level which is supported
> + since GCC 4.8. This optimization level offers a reasonable level
> + of optimization while maintaining fast compilation and a good
> + debugging experience. It is similar to '-O1' while preferring to
> + keep debug ability over runtime speed. The overall performance
> + will drop a bit (~6%).
> +
> + Use only if you want to debug the kernel, especially if you want
> + to have better kernel debugging experience with gdb facilities
> + like kgdb or qemu. If enabling this option breaks your kernel,
> + you should either disable this or find a fix (mostly in the arch
> + code). Currently this option has only be tested on x86_64 platform.

been tested

> +
> + If unsure, select N.
> +
> config ENABLE_WARN_DEPRECATED
> bool "Enable __deprecated logic"
> default y
>


--
~Randy

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