Re: [PATCH] kconfig: remove EXPERT from CHECKPOINT_RESTORE

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Kees Cook <keescook@xxxxxxxxxxxx> writes:

> On Fri, Jul 13, 2018 at 1:55 PM, Andrew Morton
> <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:
>> On Thu, 12 Jul 2018 11:33:33 -0500 ebiederm@xxxxxxxxxxxx (Eric W. Biederman) wrote:
>>> What is the value of disabling this functionality ever?
>>>
>>> Is there any reason why we don't just delete CONFIG_CHECKPOINT_RESTORE
>>> entirely?
>>
>> For the vast number of Linux machines which aren't servers?  Check out
>> some defconfigs - only one of arm's 119 defconfigs selects it.
>
> Right, and I would bet the minification folks would like to keep it
> out of their builds too. I think we should keep the config.

I take it then you are volunteering to test with and without the config
option?

Even if the config option is kept I intend to rip it out every time I
wind up touching code with it in.  Config options have a real cost in
testing and development.

For a config option that no one has come forward with an actual real
world use case for disabling, that cost seems much too high.

Eric

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