netdev - Re: merge window is open. bpf-next is still open.

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Message-ID: <20201013075016.61028eee@canb.auug.org.au>
Date:   Tue, 13 Oct 2020 07:50:16 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     Jakub Kicinski <kuba@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        bpf <bpf@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>,
        Kernel Team <Kernel-team@...com>,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: merge window is open. bpf-next is still open.

Hi Alexei,

On Mon, 12 Oct 2020 13:15:16 -0700 Alexei Starovoitov <alexei.starovoitov@...il.com> wrote:
>
> You mean keep pushing into bpf-next/master ?
> The only reason is linux-next.
> But coming to think about it again, let's fix linux-next process instead.
> 
> Stephen,
> could you switch linux-next to take from bpf.git during the merge window
> and then go back to bpf-next.git after the merge window?
> That will help everyone. CIs wouldn't need to flip flop.
> People will keep basing their features on bpf-next/master all the time, etc.
> The only inconvenience is for linux-next. I think that's a reasonable trade-off.
> In other words bpf-next/master will always be open for new features.
> After the merge window bpf-next/master will get rebased to rc1.

I already fetch bpf.git#master all the time (that is supposed to be
fixes for the current release and gets merged into the net tree, right?)

How about this: you create a for-next branch in the bpf-next tree and I
fetch that instead of your master branch.  What you do is always work
in your master branch and whenever it is "ready", you just merge master
into for-next and that is what linux-next works with (net-next still
merges your master branch as now).  So the for-next branch consists
only of consecutive merges of your master branch.

During the merge window you do *not* merge master into for-next (and,
in fact, everything in for-next should have been merged into the
net-next tree anyway, right?) and then when -rc1 is released, you reset
for-next to -rc1 and start merging master into it again.

This way the commit SHA1s are stable and I don't have to remember to
switch branches/trees every merge window (which I would forget
sometimes for sure :-)).
-- 
Cheers,
Stephen Rothwell

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