linux-kernel - Re: linux-next: manual merge of the drbd tree with the block trees

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Date:	Mon, 14 Jun 2010 11:45:00 +0200
From:	Jens Axboe <axboe@...nel.dk>
To:	Philipp Reisner <philipp.reisner@...bit.com>
CC:	Stephen Rothwell <sfr@...b.auug.org.au>, drbd-dev@...ts.linbit.com,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: linux-next: manual merge of the drbd tree with the block trees

On 2010-06-14 11:43, Philipp Reisner wrote:
> Am Montag, 14. Juni 2010, um 11:08:28 schrieb Jens Axboe:
>> On 2010-06-14 03:26, Stephen Rothwell wrote:
>>> Hi Jens, Philipp,
>>>
>>> On Thu, 10 Jun 2010 08:01:35 +0200 Jens Axboe <axboe@...nel.dk> wrote:
>>>> I'm starting to think that it would be a little easier if you did not
>>>> pull the drbd tree, I really should be pulling that into my -next branch
>>>> instead.
>>>
>>> Given that the drbd tree has not been updated to match the increasingly
>>> different block tree, I have dropped it for today.
>>>
>>> There a a few possibilities here:
>>> 	- I just drop the drbd tree completely and it only gets merged
>>>
>>> into the block tree.
>>>
>>> 	- if the drbd tree doesn't actually depend on any of the features
>>>
>>> in the block tree then it could be rebased onto Linus tree (and I would
>>> cope with any merge fixups - as I do with many other trees).
>>>
>>> 	- if it does depend on things in the block tree, those particular
>>>
>>> features in the block tree could be put in a separate branch that is
>>> never rebased and then that branch could be merged into both the block
>>> and drbd trees (this has been done before e.g. stuff in the vfs tree.
>>>
>>> 	- the drbd tree could be rebased on tom of the current block tree
>>>
>>> (but then it must be kept up to date if the block tree is rebased).
>>
>> The thing with the dependencies is that sometimes they are true,
>> sometimes they are not. What I suggested to the drbd team is that they
>> always just base off Linus and then ask me to pull their changes, then I
>> will resolve any potential conflicts when that happens. The consequence
>> would be that you stop pulling the drbd tree separately.
> 
> Ok, from now on I will use Linus most recent -rc as base and put DRBD
> patches on top of that. -- I will do this today (CEST timezone).

You want to continue to use for-2.6.xx for your next version updates, as
that has a larger risk of containing things you need to adapt to. But
for current version patches, Linus' branch is fine.

-- 
Jens Axboe

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