From mboxrd@z Thu Jan  1 00:00:00 1970
From: Minchan Kim <minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Subject: Re: [PATCH v4 00/16] MADV_FREE support
Date: Wed, 25 Nov 2015 11:53:18 +0900
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To: Andrew Morton <akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, Michael Kerrisk <mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Hugh Dickins <hughd-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>, Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>, Rik van Riel <riel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, Mel Gorman <mgorman-l3A5Bk7waGM@public.gmane.org>, KOSAKI Motohiro <kosaki.motohiro-+CUm20s59erQFUHtdCDX3A@public.gmane.org>, Jason Evans <je-b10kYP2dOMg@public.gmane.org>, Daniel Micay <danielmicay-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, "Kirill A. Shutemov" <kirill-oKw7cIdHH8eLwutG50LtGA@public.gmane.org>, Shaohua Li <shli-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, Michal Hocko <mhocko-AlSwsSmVLrQ@public.gmane.org>, yalin.wang2010-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, Andy Lutomirski <luto-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org>
List-Id: linux-api@vger.kernel.org

Hi Andrew,

On Tue, Nov 24, 2015 at 01:58:51PM -0800, Andrew Morton wrote:
> On Fri, 20 Nov 2015 17:02:32 +0900 Minchan Kim <minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:
> 
> > I have been spent a lot of time to land MADV_FREE feature
> > by request of userland people(esp, Daniel and Jason, jemalloc guys.
> 
> A couple of things...
> 
> There's a massive and complex reject storm against Kirill's page-flags
> and thp changes.  The problems in hugetlb.c are more than I can
> reasonably fix up, sorry.  How would you feel about redoing the patches
> against next -mm?

No problem at all.

> 
> Secondly, "mm: introduce lazyfree LRU list" and "mm: support MADV_FREE
> on swapless system" are new, and require significant reviewer
> attention.  But there's so much other stuff flying around that I doubt
> if we'll get effective review.  So perhaps it would be best to shelve
> those new things and introduce them later, after the basic old
> MADV_FREE work has settled in?
> 

That's really what we(Daniel, Michael and me) want so far.
A people who is reluctant to it is Johannes who wanted to support
MADV_FREE on swapless system via new LRU from the beginning.

If Johannes is not strong against Andrew's plan, I will resend
new patchset(ie, not including new stuff) based on next -mmotm.

Hannes?