Re: [PATCH 1/2] mm, Make __get_user_pages return -EHWPOISON for HWPOISON page optionally

[Andi Kleen]

> > Also longer term we'll get compilers that can do cross-file inlining
> > for optimized builds.
> 
> Which we'll probably need to turn off all over the place :(

Why? 

> 
> > So please better avoid these kinds of micro optimizations unless
> > it's a really really extremly speed critical path.
> 
> It's not just speed and it's not just .text size, either. Calling a
> ten-arg function consumes stack space.

gcc is pretty good at handling tail calls. Take a look at the code
it generates.


-Andi
-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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