[PATCH 00/58] LSM: Module stacking for AppArmor

[Casey Schaufler]

On 6/4/2019 1:42 PM, James Morris wrote:
> On Tue, 4 Jun 2019, Casey Schaufler wrote:
>
>>> It isn't free so there should be a cost/benefit analysis.
>> Some benchmarking is definitely in order, but most
>> of what's you're calling out as downside is hypothetical
>> or based on assumption. 
> When you're proposing changes such as these, which make fundamental and 
> far-reaching changes, the burden is on you to present the cost/benefit 
> analysis.

Granted. There has been substantial conversation about it
over the years, but I have not done well including it in
this discussion.

> You can't just say "Here are some changes and here are the benefits, and 
> any possible costs are merely hypothetical".

Of course. Nonetheless, no evidence for performance impact has
been provided, while it has been asserted.