From: Daniel Vetter <daniel.vetter@ffwll.ch>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: ksummit <ksummit-discuss@lists.linuxfoundation.org>
Subject: Re: [Ksummit-discuss] [MAINTAINERS SUMMIT] Bug-introducing patches
Date: Fri, 7 Sep 2018 11:07:05 +0200 [thread overview]
Message-ID: <CAKMK7uEjG-9jY4ptCmyqXDQtg=WCkBYaf58ycHk2_ib+VZ0x4g@mail.gmail.com> (raw)
In-Reply-To: <CAMuHMdV=m7y_Jj7mgSo1SZGCEpXJz4R-y-KbXSoi+OaDmBtwHQ@mail.gmail.com>
On Fri, Sep 7, 2018 at 10:40 AM, Geert Uytterhoeven
<geert@linux-m68k.org> wrote:
> On Fri, Sep 7, 2018 at 4:45 AM Steven Rostedt <rostedt@goodmis.org> wrote:
>> Another issue about having fixes sit in linux-next for some time after
>> -rc5, is that by that time, linux-next is filled with new development
>> code waiting for the next merge window. A subtle fix for a bug that
>> wasn't caught by linux-next in the first place (how else would that bug
>> still be around by rc5?) is highly likely not to catch a bug with the
>> fix to that subtle bug.
>
> Or the issue may never show up in linux-next at all.
>
> With strict by-subsystem merge policies, splitting a complicated patch set
> by subsystem and scheduling it for inclusion across multiple kernel
> versions can be challenging. If anything slightly related is applied
> independently, or due to a scheduling oversight or merge window miss, this
> may lead to a regression in mainline that is never present in linux-next,
> and usually only detected late, leading to a fix after -rc5.
Aside: I'm still baffled at how much soc people split up their work.
As you point out, testing becomes a game of luck, because integration
happens only in the merge window for real.
Anything I'm involved in I'm insisting on a proper topic branch that
everyone pulls in, to make sure that we can test the full interactions
when we actually feature-freeze before the merge window. Usually that
means baking the merge into the drm side, because we do a lot more
testing than others (e.g. upstream intel audio validation is done
through the drm trees too - it doesn't work that great because it's
post-merge only for sound).
-Daniel
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
next prev parent reply other threads:[~2018-09-07 9:07 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
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 [this message]
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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