Re: [PATCH V4 linux-next 00/12] VDPA support for Mellanox ConnectX devices

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On Wed, 2020-08-05 at 09:12 -0400, Michael S. Tsirkin wrote:
> On Wed, Aug 05, 2020 at 04:01:58PM +0300, Eli Cohen wrote:
> > On Wed, Aug 05, 2020 at 08:48:52AM -0400, Michael S. Tsirkin wrote:
> > > > Did you merge this?:
> > > > git pull
> > > > git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux.gi
> > > > t mlx5-next
> > > 
> > > I can only merge this tree if no one else will. Linus does not
> > > like
> > > getting same patches through two trees.
> > > 
> > > Is this the case? Is mlx5-next going to be merged through
> > > my tree in this cycle?
> > > 
> > 
> > Saeed Mahameed from Mellanox (located in California) usuaally sends
> > out
> > net patches. So he's supposed to send that to Dave Miller.
> > 
> > I think Saeed should answer this. Let's wait a few more hours till
> > he
> > wakes up.
> 
> Alternatives:
> - merge vdpa through Saeed's tree. I can ack that, we'll need to
>   resolve any conflicts by merging the two trees and show the
>   result to Linus so he can resolve the merge in the same way.
> - extract just the necessary patches that are needed for vdpa and
>   merge through my tree.
> - if Saeed sends his pull today, it's likely it will be merged
>   early next week. Then I can rebase and send a pull with your
> patches
>   on top. A bit risky.
> - do some tricks with build. E.g. disable build of your code,
>   and enable in Saeed's tree when everything is merged together.
>   Can be somewhat hard.
> 

Hi Michael,

We do this all the time with net-next and rdma,
mlx5-next is a very small branch based on a very early rc that includes
mlx5 shared stuff between rdma and net-next, and now virtio as well.

we send pull requests of mlx5-next to both rdma and net-next with the
respective features, exactly as we did here, and it works nicely, since
we reduce the number of conflicts to 0 between different subsystems
that rely on mlx5 core.

all the alternative you suggested have never been tried before :),
net-next is Closed, so i can't do further submissions.


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