Re: linux-next: please clean up the livepatching tree

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On Wed, 3 Aug 2016, Stephen Rothwell wrote:

> > This is a part we keep discussing from time to time, and I still don't 
> > understand why it bothers you so much. The only reason is to keep the 
> > branch non-rebasing, because it has downstreams. Code-wise, it's 
> > always equivalent to what end up being merged, but without the actual 
> > superfluous merge commits.
> 
> The problem from my point of view is that git seems to take more time
> to merge the tree into linux-next (I know this isn't much for just one
> tree, but I currently have over 200 trees to merge each day).  

Because of merge commits the number of which is below 100? That's an 
interesting observation and quite unexpected bottleneck in git.

> Also, having all those extra merges complicates the structure of my tree 
> and presumably makes it harder for git to merge other trees.  Its also 
> possible (I have seen this in other trees) for the merge commits 
> themselves to generate conflicts with (merge) commits in Linus' and 
> other trees.
> 
> Also, I am not sure why you have a branch that ask Linus to merge 
> separate from the branch you have me merge?

Exactly to avoid Linus' tree being polluted by the extra merge commits.

My workflow is really simple -- development happens in (a lot of) topic 
branches, and each and every time any of the topic branches is updated by 
a new commit, that topic branch gets merged into for-next.

Once code should go to Linus, the branches are merged at once into 
'for-linus' brach, and it's guaranteed to be code-wise the same as what 
was gradually appearing in for-next.

What other workflow do you suggest for maintainers like me, who are using 
a lot of topic branches?

If this is so bothering for you, I'd just start instructing for-next 
downstreams to stop using that branch so that it could be easily rebased.

Thanks,

-- 
Jiri Kosina
SUSE Labs

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