linux-kernel - Re: [KORG] Re: kernel.org lies about latest -mm kernel

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Date:	Sun, 07 Jan 2007 15:47:37 +1100
From:	Nigel Cunningham <nigel@...el.suspend2.net>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>, "J.H." <warthog9@...nel.org>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Andrew Morton <akpm@...l.org>, Pavel Machek <pavel@....cz>,
	kernel list <linux-kernel@...r.kernel.org>,
	webmaster@...nel.org
Subject: Re: [KORG] Re: kernel.org lies about latest -mm kernel

Hi.

On Sat, 2007-01-06 at 23:10 -0500, Jeff Garzik wrote:
> Nigel Cunningham wrote:
> > Hi.
> > 
> > On Tue, 2006-12-26 at 08:49 -0800, H. Peter Anvin wrote:
> >> Nigel Cunningham wrote:
> >>> Hi.
> >>>
> >>> I've have git trees against a few versions besides Linus', and have just
> >>> moved all but Linus' to staging to help until you can get your new
> >>> hardware. If others were encouraged to do the same, it might help a lot?
> >>>
> >> Not really.  In fact, it would hardly help at all.
> >>
> >> The two things git users can do to help is:
> >>
> >> 1. Make sure your alternatives file is set up correctly;
> >> 2. Keep your trees packed and pruned, to keep the file count down.
> >>
> >> If you do this, the load imposed by a single git tree is fairly negible.
> > 
> > Sorry for the slow reply, and the ignorance... what's an alternatives
> > file? I've never heard of them before.
> 
> It's highly useful but poorly documented method of referencing 
> repository B's objects from repository A.
> 
> When you clone locally
> 
> 	git clone --reference linus-2.6 linus-2.6 nigel-2.6
> 
> it will create nigel-2.6 with zero objects, and an alternatives file 
> pointing to 'linus-2.6' local repository.  When you commit, only the 
> objects not already in linus-2.6 will be found in nigel-2.6.
> 
> It's far better "git clone -l ..." because you don't even have the 
> additional hardlinked inodes, and don't have to run "git relink" locally.

Cool. I'll have a play :)

Thanks!

Nigel

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