Re: [PATCH] mm, swap: Make VMA based swap readahead configurable

[Michal Hocko]

On Thu 21-09-17 09:33:10, Huang, Ying wrote:
> From: Huang Ying <ying.huang@xxxxxxxxx>
> 
> This patch adds a new Kconfig option VMA_SWAP_READAHEAD and wraps VMA
> based swap readahead code inside #ifdef CONFIG_VMA_SWAP_READAHEAD/#endif.
> This is more friendly for tiny kernels.

How (much)?

> And as pointed to by Minchan
> Kim, give people who want to disable the swap readahead an opportunity
> to notice the changes to the swap readahead algorithm and the
> corresponding knobs.

Why would anyone want that?

Please note that adding new config options make the already complicated
config space even more problematic so there should be a good reason to
add one. Please make sure your justification is clear on why this is
worth the future maintenance and configurability burden.
-- 
Michal Hocko
SUSE Labs