From: Sasha Levin <Alexander.Levin@microsoft.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: "ksummit-discuss@lists.linuxfoundation.org"
<ksummit-discuss@lists.linuxfoundation.org>
Subject: Re: [Ksummit-discuss] [MAINTAINERS SUMMIT] Bug-introducing patches
Date: Fri, 7 Sep 2018 00:51:42 +0000 [thread overview]
Message-ID: <20180907004944.GD16300@sasha-vm> (raw)
In-Reply-To: <20180905101710.73137669@gandalf.local.home>
On Wed, Sep 05, 2018 at 10:17:10AM -0400, Steven Rostedt wrote:
>On Tue, 4 Sep 2018 22:53:23 +0200
>Daniel Vetter <daniel.vetter@ffwll.ch> wrote:
>
>> > I've previously sent a mail
>> > (https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flwn.net%2Fml%2Flinux-kernel%2F20180501163818.GD1468%40sasha-vm%2F&data=02%7C01%7CAlexander.Levin%40microsoft.com%7C7643e868bb5e4d76817c08d6133a46cb%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636717538346291007&sdata=MEleczglT%2FGM46uI0F4hwbofY9ARD2NEQLS7NW37ntg%3D&reserved=0) about
>> > this topic, so I won't repeat everything here.
>>
>> That thread sprawled all over the place, and I honestly don't even
>> recollect half of it. I'd very much appreciate a summary of the
>> problems and different viewpoints shared in there. Otherwise I think
>> we'll just have the exact same discussion once more ...
>
>I was thinking the exact same thing.
Assuming you've read the original mail, it appears that most parties who
participated in the discussion agreed that there's an issue where
patches that go in during (late) -rc cycles seems to be less tested and
are buggier than they should be.
Most of that thread discussed possible solutions such as:
- Not taking non-critical patches past -rcX (-rc4 seemed to be a
popular one).
- -rc patches must fix something introduced in the current merge
window. Patches fixing anything older should go in the next merge
window.
- 1 or more weeks at the end of the cycle where nothing is taken at all
and we only run testing.
- Mandate X days/weeks in linux-next before a patch goes in.
We've never reached a conclusion because maintainers have different
approach to this and different pain points, so it seemed difficult
finding a one-size-fits-all solution.
If you look at the few last -rc cycles of every release in recent
history, almost all of them were written within 2-3 days of being
merged. There is no way to properly test these patches.
Furthermore, these patches often end up in Stable, which is quite bad of
the Stable kernel's regression rates.
--
Thanks,
Sasha
next prev parent reply other threads:[~2018-09-07 0:51 UTC|newest]
Thread overview: 138+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-04 20:16 [Ksummit-discuss] [MAINTAINERS SUMMIT] Bug-introducing patches Sasha Levin
2018-09-04 20:53 ` Daniel Vetter
2018-09-05 14:17 ` Steven Rostedt
2018-09-07 0:51 ` Sasha Levin [this message]
2018-09-07 1:09 ` Steven Rostedt
2018-09-07 20:12 ` Greg KH
2018-09-07 21:12 ` Greg KH
2018-09-07 1:09 ` Linus Torvalds
2018-09-07 1:49 ` Sasha Levin
2018-09-07 2:31 ` Linus Torvalds
2018-09-07 2:45 ` Steven Rostedt
2018-09-07 3:43 ` Linus Torvalds
2018-09-07 8:52 ` Daniel Vetter
2018-09-07 8:40 ` Geert Uytterhoeven
2018-09-07 9:07 ` Daniel Vetter
2018-09-07 9:28 ` Geert Uytterhoeven
2018-09-07 17:05 ` Olof Johansson
2018-09-07 14:54 ` Sasha Levin
2018-09-07 15:52 ` Linus Torvalds
2018-09-07 16:17 ` Linus Torvalds
2018-09-07 21:39 ` Mauro Carvalho Chehab
2018-09-09 12:50 ` Stephen Rothwell
2018-09-10 20:05 ` Tony Lindgren
2018-09-10 19:43 ` Sasha Levin
2018-09-10 20:45 ` Steven Rostedt
2018-09-10 21:20 ` Guenter Roeck
2018-09-10 21:46 ` Steven Rostedt
2018-09-10 23:03 ` Eduardo Valentin
2018-09-10 23:13 ` Steven Rostedt
2018-09-11 15:42 ` Steven Rostedt
2018-09-11 17:40 ` Tony Lindgren
2018-09-11 17:47 ` James Bottomley
2018-09-11 18:12 ` Eduardo Valentin
2018-09-11 18:17 ` Geert Uytterhoeven
2018-09-12 15:15 ` Eduardo Valentin
2018-09-11 18:19 ` James Bottomley
2018-09-12 15:17 ` Eduardo Valentin
2018-09-11 18:39 ` Steven Rostedt
2018-09-11 20:09 ` James Bottomley
2018-09-11 20:31 ` Steven Rostedt
2018-09-11 22:53 ` James Bottomley
2018-09-11 23:04 ` Sasha Levin
2018-09-11 23:11 ` James Bottomley
2018-09-11 23:20 ` Sasha Levin
2018-09-12 15:41 ` Eduardo Valentin
2018-09-11 23:22 ` Tony Lindgren
2018-09-11 23:29 ` James Bottomley
2018-09-12 11:55 ` Geert Uytterhoeven
2018-09-12 12:03 ` Laurent Pinchart
2018-09-12 12:29 ` Thomas Gleixner
2018-09-12 12:53 ` Laurent Pinchart
2018-09-12 13:10 ` Alexandre Belloni
2018-09-12 13:30 ` Thomas Gleixner
2018-09-12 23:16 ` Laurent Pinchart
2018-09-12 14:11 ` Thomas Gleixner
2018-09-19 8:26 ` Laurent Pinchart
2018-09-20 9:02 ` Rafael J. Wysocki
2018-09-20 10:10 ` Laurent Pinchart
2018-09-20 11:00 ` Daniel Vetter
2018-09-20 11:08 ` Laurent Pinchart
2018-09-20 11:49 ` Daniel Vetter
2018-09-12 12:36 ` James Bottomley
2018-09-12 13:38 ` Guenter Roeck
2018-09-12 13:59 ` Tony Lindgren
2018-09-12 10:04 ` Mark Brown
2018-09-12 20:24 ` Steven Rostedt
2018-09-12 20:29 ` Sasha Levin
2018-09-13 0:19 ` Stephen Rothwell
2018-09-13 11:39 ` Mark Brown
2018-09-19 6:27 ` Stephen Rothwell
2018-09-19 17:24 ` Mark Brown
2018-09-19 21:42 ` Stephen Rothwell
2018-09-11 0:49 ` Stephen Rothwell
2018-09-11 1:01 ` Al Viro
2018-09-11 0:47 ` Stephen Rothwell
2018-09-11 17:35 ` Linus Torvalds
2018-09-11 0:43 ` Stephen Rothwell
2018-09-11 16:49 ` Guenter Roeck
2018-09-11 17:47 ` Guenter Roeck
2018-09-11 11:18 ` Mark Brown
2018-09-11 17:02 ` Guenter Roeck
2018-09-11 17:12 ` Jani Nikula
2018-09-11 17:31 ` Mark Brown
2018-09-11 17:41 ` Daniel Vetter
2018-09-11 18:54 ` Mark Brown
2018-09-11 18:03 ` Geert Uytterhoeven
2018-09-11 17:22 ` James Bottomley
2018-09-11 17:56 ` Mark Brown
2018-09-11 18:00 ` James Bottomley
2018-09-11 18:16 ` Mark Brown
2018-09-11 18:07 ` Geert Uytterhoeven
2018-09-12 9:09 ` Dan Carpenter
2018-09-11 17:26 ` Mark Brown
2018-09-11 18:45 ` Steven Rostedt
2018-09-11 18:57 ` Daniel Vetter
2018-09-11 20:15 ` Thomas Gleixner
2018-09-12 9:03 ` Dan Carpenter
2018-09-10 23:01 ` Eduardo Valentin
2018-09-10 23:12 ` Steven Rostedt
2018-09-10 23:32 ` Eduardo Valentin
2018-09-10 23:38 ` Guenter Roeck
2018-09-10 23:38 ` Sasha Levin
2018-09-07 2:33 ` Steven Rostedt
2018-09-07 2:52 ` Guenter Roeck
2018-09-07 14:37 ` Laura Abbott
2018-09-07 15:06 ` Sasha Levin
2018-09-07 15:54 ` Laura Abbott
2018-09-07 16:09 ` Sasha Levin
2018-09-07 20:23 ` Greg KH
2018-09-07 21:13 ` Sasha Levin
2018-09-07 22:27 ` Linus Torvalds
2018-09-07 22:43 ` Guenter Roeck
2018-09-07 22:53 ` Linus Torvalds
2018-09-07 22:57 ` Sasha Levin
2018-09-07 23:52 ` Guenter Roeck
2018-09-08 16:33 ` Greg Kroah-Hartman
2018-09-08 18:35 ` Guenter Roeck
2018-09-10 13:47 ` Mark Brown
2018-09-09 4:36 ` Sasha Levin
2018-09-10 16:20 ` Dan Rue
2018-09-07 21:32 ` Dan Carpenter
2018-09-07 21:43 ` Sasha Levin
2018-09-08 13:20 ` Dan Carpenter
2018-09-10 8:23 ` Jan Kara
2018-09-10 7:53 ` Jan Kara
2018-09-07 3:38 ` Al Viro
2018-09-07 4:27 ` Theodore Y. Ts'o
2018-09-07 5:45 ` Stephen Rothwell
2018-09-07 9:13 ` Daniel Vetter
2018-09-07 11:32 ` Mark Brown
2018-09-07 21:06 ` Mauro Carvalho Chehab
2018-09-08 9:44 ` Laurent Pinchart
2018-09-08 11:48 ` Mauro Carvalho Chehab
2018-09-09 14:26 ` Laurent Pinchart
2018-09-10 22:14 ` Eduardo Valentin
2018-09-07 14:56 ` Sasha Levin
2018-09-07 15:07 ` Jens Axboe
2018-09-07 20:58 ` Mauro Carvalho Chehab
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