Re: [PATCH 1/3 staging-next] android: Collect statistics from lowmemorykiller

[Michal Hocko <mhocko@kernel.org>]

On Thu 09-02-17 21:07:37, Greg KH wrote:
> On Thu, Feb 09, 2017 at 08:26:41PM +0100, Michal Hocko wrote:
> > On Thu 09-02-17 14:21:45, peter enderborg wrote:
> > > This collects stats for shrinker calls and how much
> > > waste work we do within the lowmemorykiller.
> > 
> > This doesn't explain why do we need this information and who is going to
> > use it. Not to mention it exports it in /proc which is considered a
> > stable user API. This is a no-go, especially for something that is still
> > lingering in the staging tree without any actuall effort to make it
> > fully supported MM feature. I am actually strongly inclined to simply
> > drop lmk from the tree completely.
> 
> I thought that someone was working to get the "native" mm features to
> work properly with the lmk "feature"  Do you recall if that work got
> rejected, or just never happened?

Never happened AFAIR. There were some attempts to tune the current
behavior which has been rejected for one reason or another but I am not
really aware of anybody working on moving the code from staging area.

I already have this in the to-send queue, just didn't get to post it yet
because I planned to polish the reasoning some more.
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