[PATCH v5 2/3] mm: init: report memory auto-initialization features at boot time

[Andrew Morton]

On Wed, 29 May 2019 14:38:11 +0200 Alexander Potapenko <glider at google.com> wrote:

> Print the currently enabled stack and heap initialization modes.
> 
> The possible options for stack are:
>  - "all" for CONFIG_INIT_STACK_ALL;
>  - "byref_all" for CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL;
>  - "byref" for CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF;
>  - "__user" for CONFIG_GCC_PLUGIN_STRUCTLEAK_USER;
>  - "off" otherwise.
> 
> Depending on the values of init_on_alloc and init_on_free boottime
> options we also report "heap alloc" and "heap free" as "on"/"off".

Why?

Please fully describe the benefit to users so that others can judge the
desirability of the patch.  And so they can review it effectively, etc.

Always!

> In the init_on_free mode initializing pages at boot time may take some
> time, so print a notice about that as well.

How much time?