linux-kernel - Re: linux-next: manual merge of the tip tree

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Message-ID: <20131026140125.GA13424@mudshark.cambridge.arm.com>
Date:	Sat, 26 Oct 2013 15:01:25 +0100
From:	Will Deacon <will.deacon@....com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Thierry Reding <thierry.reding@...il.com>,
	Jean Pihet <jean.pihet@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <peterz@...radead.org>,
	"linux-next@...r.kernel.org" <linux-next@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux@....linux.org.uk
Subject: Re: linux-next: manual merge of the tip tree

Hi Ingo,

[adding rmk]

On Sat, Oct 26, 2013 at 09:40:33AM +0100, Ingo Molnar wrote:
> * Will Deacon <will.deacon@....com> wrote:
> > On Fri, Oct 25, 2013 at 02:03:42PM +0100, Thierry Reding wrote:
> > > I fixed it up (see below). Please verify that the resolution looks good.
> > > Also note that this isn't really a trivial resolution of a conflict, but
> > > required modifying various other files. That causes rerere magic not to
> > > work and needs part of conflict to be resolved manually. Perhaps a good
> > > idea would be to rebase Jean's patch on top of the cleanups going on in
> > > the tip tree? Perhaps even carry the patch in the tip tree?
> > 
> > These came via my tree (arm perf) after discussion here:
> > 
> >   http://lists.infradead.org/pipermail/linux-arm-kernel/2013-October/203077.html
> > 
> > Now that they've been pulled by rmk, we can't back them out with 
> > ugly reverts, so I'm not sure what we can do to resolve in the ARM 
> > tree; it looks like the perf Makefile has changed significantly in 
> > -tip.
> 
> I realize that it was acked by Arnaldo, but for workflow reasons I'd 
> really prefer it if non-trivial perf tooling patches went to Arnaldo 
> as a pull request so that he can resolve any such conflicts. perf is 
> in constant development so it's less work for you that way.

Sure. I wasn't aware quite how much you guys had planned for the perf
Makefile and I (wrongly) assumed that Arnaldo's ack was enough of an
indication that conflicts would be unlikely and/or trivial.

In future, I'll push back on any perf changes outside of arch/ in my tree,
but that doesn't help us get out of the current situation: the patches are
currently sitting in rmk's tree for 3.13, so that won't meet with -tip
(outside of next) until Linus pulls them both. What can we do about that?

Will
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