linux-kernel - Re: [RFC] to rebase or not to rebase on linux-next

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Date:	Tue, 27 Oct 2009 19:54:06 +0100
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	Theodore Tso <tytso@....edu>
CC:	"Luck, Tony" <tony.luck@...el.com>, Ingo Molnar <mingo@...e.hu>,
	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Nicolas Pitre <nico@...xnic.net>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	"Luis R. Rodriguez" <mcgrof@...il.com>,
	Jeff Garzik <jeff@...zik.org>,
	Robert Richter <robert.richter@....com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Jean Delvare <khali@...ux-fr.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [RFC] to rebase or not to rebase on linux-next

On 10/27/2009 7:07 PM, Theodore Tso wrote:
> On Mon, Oct 26, 2009 at 07:01:57PM +0100, Stefan Richter wrote:
>> A missing
>> allocation failure check or a missing tracepoint don't break
>> bisectability.  So why discard this history?  (It was already published
>> in a release preview.)
> 
> There are multiple issues for rewinding patches.  One is to avoid
> breaking bisectability.  Other is to keep related changes in
> functionality in a single place.  2-3 years for now, does anyone
> really care about retaining development history?  In the human memory,
> one of the most important parts of long-term memory formation is
> *forgetting*; that is, editing down everything that happened down to
> the most cogent and importants bits of history.
[...]

Sure.  But when is the deadline for doing this?  The evening before you
send a pull request to Linus?  Or already when you commit to the branch
from which Stephen pulls into linux-next, which means:  This is code and
history which I would ask Linus to pull right now if he was in merge
mode today.

[I for one would indeed add non-essential credits or otherwise touch up
the history even if it already was in linux-next but Linus' next merge
window isn't there yet.  But I would batch such rewinds up for a single
occasion between merge windows, and only do them at all if there are
several such changes to make it worthwhile.  And I only do that because
I work at driver code with limited interaction with other subsystems,
and virtually no co-developers in the project.]
-- 
Stefan Richter
-=====-==--= =-=- ==-==
http://arcgraph.de/sr/
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