From: Guenter Roeck <linux@roeck-us.net>
To: Olof Johansson <olof@lixom.net>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>,
"ltsi-dev@lists.linuxfoundation.org"
<ltsi-dev@lists.linuxfoundation.org>,
"ksummit-discuss@lists.linuxfoundation.org"
<ksummit-discuss@lists.linuxfoundation.org>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>
Subject: Re: [Ksummit-discuss] [Stable kernel] feature backporting collaboration
Date: Fri, 2 Sep 2016 22:29:14 -0700 [thread overview]
Message-ID: <20160903052914.GB17057@roeck-us.net> (raw)
In-Reply-To: <CAOesGMibzGC3Nz+DmERJUea4jbJQ28hDGDGMuHkr+o=Wb3iUdA@mail.gmail.com>
On Fri, Sep 02, 2016 at 11:21:38AM -0700, Olof Johansson wrote:
> On Fri, Sep 2, 2016 at 7:42 AM, James Bottomley
> <James.Bottomley@hansenpartnership.com> wrote:
> > On Fri, 2016-09-02 at 10:54 +0100, Mark Brown wrote:
> >> On Thu, Sep 01, 2016 at 09:25:31PM -0400, Levin, Alexander via
> >> Ksummit-discuss wrote:
> >> > On Wed, Aug 31, 2016 at 10:01:13PM -0400, Alex Shi wrote:
> >>
> >> > > I am a Linaro stable kernel maintainer. Our stable kernel is base
> >> > > on LTS plus much of upstream features backporting on them. Here
> >> > > is the detailed
> >>
> >> > I really disagree with this approach. I think that backporting
> >> > board support like what LTSI does might make sense since it's self
> >> > contained, but what LSK does is just crazy.
> >>
> >> The bulk of these features are exactly that - they're isolated driver
> >> specific code or new subsystems. There are also some things with
> >> wider impact but it's nowhere near all of them.
> >
> > It's crazy because it encourages precisely the wrong behaviour: vendors
> > target this tree not upstream.
>
> The one case where it is warranted is for features that went in since
> the last LTS release.
>
> Pushing vendors all the way to target a non-LTS release is a bit more
> aggressive that needed, in my opinion.
>
Getting a bit off track here, but at least some vendors don't even track
stable kernels in the first place because they think it is too risky/unstable.
We just had a discussion about that, after all. Personally I would prefer
to get stable kernels to the point where people feel comfortable using them,
and then consider adding functionality on top of that if needed.
Having said that, an effort like this may still be helpful, I just wonder what
the intended use case is. Is it for vendors to actually use the new LTS+feature
branch, or for vendors to cherry-pick features from it ?
Guenter
next prev parent reply other threads:[~2016-09-03 5:29 UTC|newest]
Thread overview: 122+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-01 2:01 Alex Shi
2016-09-02 1:25 ` Levin, Alexander
2016-09-02 2:43 ` Stephen Hemminger
2016-09-02 9:59 ` Mark Brown
2016-09-02 9:54 ` Mark Brown
2016-09-02 10:16 ` [Ksummit-discuss] [LTSI-dev] " Geert Uytterhoeven
2016-09-02 14:42 ` [Ksummit-discuss] " James Bottomley
2016-09-02 14:55 ` Rik van Riel
2016-09-02 15:04 ` James Bottomley
2016-09-02 15:39 ` Rik van Riel
2016-09-02 17:06 ` Bird, Timothy
2016-09-05 1:45 ` NeilBrown
2016-09-05 11:04 ` Mark Brown
2016-09-05 22:44 ` NeilBrown
2016-09-06 0:57 ` Mark Brown
2016-09-06 5:41 ` NeilBrown
2016-09-08 18:33 ` [Ksummit-discuss] [LTSI-dev] " Bird, Timothy
2016-09-08 22:38 ` NeilBrown
2016-09-09 11:01 ` Mark Brown
2016-09-09 22:17 ` NeilBrown
2016-09-12 17:37 ` Mark Brown
2016-09-13 7:46 ` NeilBrown
2016-09-13 17:53 ` Mark Brown
2016-09-02 18:21 ` [Ksummit-discuss] " Olof Johansson
2016-09-02 23:35 ` Mark Brown
2016-09-03 5:29 ` Guenter Roeck [this message]
2016-09-03 10:40 ` Mark Brown
2016-09-04 0:10 ` Theodore Ts'o
2016-09-04 8:34 ` gregkh
2016-09-04 22:58 ` Amit Kucheria
2016-09-04 23:51 ` Theodore Ts'o
2016-09-05 12:58 ` Mark Brown
2016-09-05 11:11 ` Mark Brown
2016-09-05 14:03 ` Theodore Ts'o
2016-09-05 14:22 ` Laurent Pinchart
2016-09-06 0:35 ` Mark Brown
2016-09-06 15:30 ` James Bottomley
2016-09-06 19:44 ` gregkh
2016-09-06 22:20 ` Mark Brown
2016-09-06 22:34 ` James Bottomley
2016-09-08 18:55 ` Bird, Timothy
2016-09-08 19:19 ` gregkh
2016-09-09 10:45 ` Mark Brown
2016-09-09 11:03 ` gregkh
2016-09-09 11:48 ` Mark Brown
2016-09-06 23:23 ` Mark Brown
2016-09-06 13:34 ` Catalin Marinas
2016-09-06 16:24 ` Bartlomiej Zolnierkiewicz
2016-09-06 16:25 ` Guenter Roeck
2016-09-06 22:39 ` Mark Brown
2016-09-07 8:33 ` Jan Kara
2016-09-07 8:41 ` Jiri Kosina
2016-09-07 18:44 ` Mark Brown
2016-09-08 17:06 ` Frank Rowand
2016-09-09 10:32 ` Mark Brown
2016-09-09 15:21 ` Alex Shi
2016-09-12 15:34 ` Christoph Hellwig
2016-09-06 16:46 ` Olof Johansson
2016-09-08 8:34 ` Linus Walleij
2016-09-08 8:55 ` Vinod Koul
2016-09-09 14:32 ` Rob Herring
2016-09-09 14:23 ` Rob Herring
[not found] ` <2181684.5VzIQ6DWv4@amdc1976>
2016-09-07 9:32 ` Catalin Marinas
2016-09-07 13:07 ` Bartlomiej Zolnierkiewicz
2016-09-07 18:49 ` Mark Brown
2016-09-09 15:06 ` Alex Shi
2016-09-02 23:29 ` Mark Brown
2016-09-02 19:16 ` Levin, Alexander
2016-09-03 0:05 ` Mark Brown
2016-09-05 9:28 ` Laurent Pinchart
2016-09-21 6:58 ` Alex Shi
2016-09-21 9:23 ` gregkh
2016-09-21 14:52 ` Alex Shi
2016-09-21 15:28 ` gregkh
2016-09-21 18:50 ` Mark Brown
2016-09-22 3:15 ` Alex Shi
2016-09-21 18:22 ` Mark Brown
2016-09-21 18:54 ` Linus Walleij
2016-09-21 19:52 ` Theodore Ts'o
2016-09-22 0:43 ` Mark Brown
2016-09-22 5:20 ` gregkh
2016-09-22 12:56 ` Laurent Pinchart
2016-09-22 16:22 ` Mark Brown
2016-09-22 22:14 ` Theodore Ts'o
2016-09-23 12:28 ` Laurent Pinchart
2016-09-23 13:27 ` [Ksummit-discuss] [LTSI-dev] " Alex Shi
2016-09-23 13:40 ` Laurent Pinchart
2016-09-23 14:40 ` [Ksummit-discuss] " Mark Brown
2016-09-21 13:56 ` Theodore Ts'o
2016-09-21 15:23 ` Alex Shi
2016-09-21 15:33 ` gregkh
2016-09-21 19:16 ` Mark Brown
2016-09-02 13:47 ` Theodore Ts'o
2016-09-02 19:31 ` Levin, Alexander
2016-09-02 19:42 ` gregkh
2016-09-02 20:06 ` Levin, Alexander
2016-09-03 2:04 ` Mark Brown
2016-09-06 7:20 ` [Ksummit-discuss] [LTSI-dev] " Tsugikazu Shibata
2016-09-10 12:00 ` Theodore Ts'o
2016-09-12 16:27 ` Mark Brown
2016-09-12 17:14 ` Greg KH
2016-09-12 23:45 ` Mark Brown
2016-09-13 3:14 ` Theodore Ts'o
2016-09-13 10:14 ` Mark Brown
2016-09-13 13:19 ` Levin, Alexander
2016-09-13 6:19 ` Greg KH
2016-09-13 10:38 ` Mark Brown
2016-09-13 12:09 ` Greg KH
2016-09-13 12:20 ` Josh Boyer
2016-09-13 13:12 ` Greg KH
2016-09-13 16:23 ` Bird, Timothy
2016-09-13 19:02 ` Mark Brown
2016-09-14 14:47 ` Alex Shi
2016-09-20 5:15 ` Tsugikazu Shibata
2016-09-21 8:46 ` Alex Shi
2016-09-13 12:25 ` Geert Uytterhoeven
2016-09-13 19:21 ` Mark Brown
2016-09-14 1:49 ` Greg KH
2016-09-14 3:00 ` Guenter Roeck
2016-09-12 4:12 ` Alex Shi
2016-09-12 16:09 ` Masami Hiramatsu
2016-09-13 2:39 ` Alex Shi
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