Re: warning: no common commits - slow pull

From: Theodore Tso <tytso@mit.edu>
Date: Feb 11, 2008, 01:53 UTC
Message-ID: <20080211015342.GA26205@mit.edu>
In-Reply-To: <200802102007.38838.lenb@kernel.org>

On Sun, Feb 10, 2008 at 08:07:38PM -0500, Len Brown wrote:

Show 20 quoted lines

> A couple of hours ago I pulled my reference copy of Linux tree,
> which brought the tip here:
> 
> commit 7cf712db6087342e5e7e259d3883a7b5ac3212d1
> Merge: 58a14ee... 30ddb15...
> Author: Linus Torvalds <torvalds@woody.linux-foundation.org>
> Date:   Sun Feb 10 12:03:57 2008 -0800
> 
>     Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
> 
> Then, 10 minutes ago I did a pull to bring the head here:
> 
> commit 19af35546de68c872dcb687613e0902a602cb20e
> Author: Linus Torvalds <torvalds@woody.linux-foundation.org>
> Date:   Sun Feb 10 14:18:14 2008 -0800
> 
>     Linux 2.6.25-rc1
> 
> But this second pull seems to have re-downloaded 172MB,
> when it should have only needed the last few commits.

Yeah, I have this problem very often when I push to the ext4 tree on master.kernel.org. Apparently the push/pull logic isn't smart about objects are found via objects/info/alterntaes, so it will needlessly transfer objects that it doesn't need to.

What I do to deal with this problem is I'll manually log into master.kernel.org, and then use the command "git-update-ref refs/heads/origin 19af35546de68c872dcb687613e0902a602cb20e", and then go back and do the push/pull. Once there is a head which points to the latest from Linus, then the push/pull logic is smart and will only download the few commitments that aren't in the local git repository and aren't found in a shared repository.

Annoying, but as long as you have shell access on the machine with the destination repository, you can work around it.

					- Ted