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

[Dave Hansen]

On 09/27/2017 06:02 PM, Huang, Ying wrote:
> I still think there may be a performance regression for some users
> because of the change of the algorithm and the knobs, and the
> performance regression can be resolved via setting the new knob.  But I
> don't think there will be a functionality regression.  Do you agree?

A performance regression is a regression.  I don't understand why we are
splitting hairs as to what kind of regression it is.

Are you only willing to fix it if it's a functional regression?