Re: [PATCH] x86: only use ERMS for user copies for larger sizes

[Ingo Molnar]

* Ingo Molnar <mingo@xxxxxxxxxx> wrote:

> So I dug into this some more:
> 
> 1)
> 
> Firstly I tracked down GCC bloating the might_fault() checks and the 
> related out-of-line code exception handling which bloats the full 
> generated function.

Sorry, I mis-remembered that detail when I wrote the email: it was 
CONFIG_HARDENED_USERCOPY=y and its object size checks that distros enable 
- and I disabled that option to simplify the size analysis.

(might_fault() doesn't have inline conditionals so shouldn't have any 
effect on the generated code.)

Thanks,

	Ingo