On Sun, Oct 7, 2012 at 7:21 PM, Andi Kleen <a...@firstfloor.org> wrote:
> Ezequiel Garcia <elezegar...@gmail.com> writes:
>
>> The new option is CONFIG_CC_DISABLE_AUTO_INLINE and it's
>> located at:
>> * Kernel hacking
>> * Disable gcc automatic inlining
>
> You don't state anywhere why you want that?
>
This is important -if not necessary- to trace memory allocations with
ftrace kmem
events. Allocations are traced through _RET_IP_ macro, which in turn
only works accurately if gcc don't inline.
Without this patch you will trace callsites like kstrdup, instead of the real
caller.
Perhaps I should explain this better in the commit message?
Thanks for reviewing,
Ezequiel
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