netdev - Re: linux-next: manual merge of the akpm-current tree with the bpf-next tree

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Message-Id: <20201214181121.afe9628c62c4b5de1f5fee94@linux-foundation.org>
Date:   Mon, 14 Dec 2020 18:11:21 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Roman Gushchin <guro@...com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        David Miller <davem@...emloft.net>,
        Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Networking <netdev@...r.kernel.org>,
        Alex Shi <alex.shi@...ux.alibaba.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Shakeel Butt <shakeelb@...gle.com>
Subject: Re: linux-next: manual merge of the akpm-current tree with the
 bpf-next tree

On Mon, 14 Dec 2020 18:06:29 -0800 Jakub Kicinski <kuba@...nel.org> wrote:

> On Mon, 14 Dec 2020 17:40:21 -0800 Andrew Morton wrote:
> > On Mon, 14 Dec 2020 17:29:43 -0800 Roman Gushchin <guro@...com> wrote:
> > > On Tue, Dec 15, 2020 at 07:21:56AM +1100, Stephen Rothwell wrote:  
> > > > On Fri, 4 Dec 2020 20:20:05 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:  
> > > > > Today's linux-next merge of the akpm-current tree got conflicts in:
> > > > > 
> > > > >   include/linux/memcontrol.h
> > > > >   mm/memcontrol.c
> > > > > 
> > > > > between commit:
> > > > > 
> > > > >   bcfe06bf2622 ("mm: memcontrol: Use helpers to read page's memcg data")
> > > > > 
> > > > > from the bpf-next tree and commits:
> > > > > 
> > > > >   6771a349b8c3 ("mm/memcg: remove incorrect comment")
> > > > >   c3970fcb1f21 ("mm: move lruvec stats update functions to vmstat.h")
> > > > > 
> > > > > from the akpm-current tree.
> > > > >   
> > > ...  
> > > > 
> > > > Just a reminder that this conflict still exists.  Commit bcfe06bf2622
> > > > is now in the net-next tree.  
> > > 
> > > Thanks, Stephen!
> > > 
> > > I wonder if it's better to update these 2 commits in the mm tree to avoid
> > > conflicts?
> > > 
> > > Basically split your fix into two and merge it into mm commits.
> > > The last chunk in the patch should be merged into "mm/memcg: remove incorrect comment".
> > > And the rest into "mm: move lruvec stats update functions to vmstat.h".
> > > 
> > > Andrew, what do you think?  
> > 
> > I have "mm/memcg: remove incorrect comment" and "mm: move lruvec stats
> > update functions to vmstat.h" staged against Linus's tree and plan to
> > send them to him later today.  So I trust the BPF tree maintainers will
> > be able to resolve these minor things when those patches turn up in
> > mainline.
> 
> Hm. The code is in net-next by now. I was thinking of sending the
> Networking PR later today (tonight?) as well. I'm happy to hold off 
> or do whatever you require, but I'd appreciate more explicit / noob
> friendly instructions.

Linus tends not to like it when tree maintainers do last-minute
conflict fixes.

> AFAIU all we can do is tell Linus about the merge issue, and point 
> at Stephen's resolution.

That's the way to do it - including a (tested?) copy in the email would
be nice.