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

[Michal Hocko]

On Fri 10-02-17 08:51:49, Greg KH wrote:
> On Fri, Feb 10, 2017 at 08:21:32AM +0100, peter enderborg wrote:
[...]
> > Until then we have to polish this version as good as we can. It is
> > essential for android as it is now.
> 
> But if no one is willing to do the work to fix the reported issues, why
> should it remain?  Can you do the work here?  You're already working on
> fixing some of the issues in a differnt way, why not do the "real work"
> here instead for everyone to benifit from?

Well, to be honest, I do not think that the current code is easily
fixable. The approach was wrong from the day 1. Abusing slab shrinkers
is just a bad place to stick this logic. This all belongs to the
userspace. For that we need a proper mm pressure notification which is
supposed to be vmpressure but that one also doesn't seem to work all
that great. So rather than trying to fix unfixable I would stronly
suggest focusing on making vmpressure work reliably.
-- 
Michal Hocko
SUSE Labs