Re: [PATCH v2 1/5] mm: introduce MADV_COLD

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On Thu, Jun 20, 2019 at 09:08:54AM +0200, Michal Hocko wrote:
> On Thu 20-06-19 09:06:51, Minchan Kim wrote:
> > On Wed, Jun 19, 2019 at 02:56:12PM +0200, Michal Hocko wrote:
> [...]
> > > Why cannot we reuse a large part of that code and differ essentially on
> > > the reclaim target check and action? Have you considered to consolidate
> > > the code to share as much as possible? Maybe that is easier said than
> > > done because the devil is always in details...
> > 
> > Yub, it was not pretty when I tried. Please see last patch in this
> > patchset.
> 
> That is bad because this code is quite subtle - especially the THP part
> of it. I will be staring at the code some more. Maybe some
> simplification pops out.

Yeah, I couldn't come up with better idea. Actually, I wanted to be
left. More suggestion to make simple/readable would be great.




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