linux-kernel - Re: [GIT PULL] regulator updates for v3.13-rc1

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Date:	Thu, 23 Jan 2014 09:27:33 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Mark Brown <broonie@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Liam Girdwood <lgirdwood@...il.com>
Subject: Re: [GIT PULL] regulator updates for v3.13-rc1

At Tue, 21 Jan 2014 11:16:57 -0800,
Linus Torvalds wrote:
> 
> On Mon, Nov 25, 2013 at 4:39 PM, Mark Brown <broonie@...nel.org> wrote:
> >
> > If you're OK with octopus merges for things like this I'll definitely
> > take another look at using them, the enormous stack of merge commits
> > always looks noisy to me in the logs and pull requests and for things
> > like driver updates there's unlikely to be much doubt about which branch
> > it was if there's a problem.
> 
> Christ. When you start doing octopus merges, you don't do it by half
> measures, do you?
> 
> I just pulled the sound updates from Takashi, and as a result got your
> merge commit 2cde51fbd0f3. That one has 66 parents.
> 
> That kind of merge either needs to be split up, or gitk needs to be
> made better about visualizing it, because it ends up being *so* wide
> that the history is hard to read.

Yep, sorry, it's my fault that I overlooked Medusa there.
I usually check with gitk, but at this time, I checked the results
only via --no-merges option for concentrating on the real changes.
Now I looked at it, and I was turned into sto..n...e......


Takashi

> I think you'll find that having that many parents also breaks old
> versions of git.
> 
> Anyway, I'd suggest you try to limit octopus merges to ~15 parents or
> less to make the visualization tools not go crazy.  Maybe aim for just
> 10 or so in most cases.
> 
> It's pulled, and it's fine, but there's clearly a balance between
> "octopus merges are fine" and "Christ, that's not an octopus, that's a
> Cthulhu merge".
> 
>                 Linus
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