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From: Mark Brown <broonie@kernel.org>
To: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Greg KH <gregkh@linuxfoundation.org>,
	"ksummit-discuss@lists.linuxfoundation.org"
	<ksummit-discuss@lists.linuxfoundation.org>
Subject: Re: [Ksummit-discuss] [MAINTAINER SUMMIT] Stable trees and release time
Date: Wed, 5 Sep 2018 11:47:00 +0100	[thread overview]
Message-ID: <20180905104700.GE9781@sirena.org.uk> (raw)
In-Reply-To: <1536141525.8121.2.camel@HansenPartnership.com>

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On Wed, Sep 05, 2018 at 10:58:45AM +0100, James Bottomley wrote:

> This really shouldn't be an issue: stable trees are backported from
> upstream.  The patch (should) work in upstream, so it should work in
> stable.  There are only a few real cases you need to worry about:

>    1. Buggy patch in upstream backported to stable. (will be caught and
>       the fix backported soon)
>    2. Missing precursor causing issues in stable alone.
>    3. Bug introduced when hand applying.

> The chances of one of these happening is non-zero, but the criteria for
> stable should mean its still better odds than the odds of hitting the
> bug it was fixing.

Some of those are substantial enough to be worth worrying about,
especially the missing precursor issues.  It's rarely an issue with the
human generated backports but the automated ones don't have a sense of
context in the selection.

There's also a risk/reward tradeoff to consider with more minor issues,
especially performance related ones.  We want people to be enthusiastic
about taking stable updates and every time they find a problem with a
backport that works against them doing that.

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  reply	other threads:[~2018-09-05 10:47 UTC|newest]

Thread overview: 74+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-04 20:58 [Ksummit-discuss] [MAINTAINER SUMMIT] Stable trees and release time Laura Abbott
2018-09-04 21:12 ` Jiri Kosina
2018-09-05 14:31   ` Greg KH
2018-09-04 21:22 ` Justin Forbes
2018-09-05 14:42   ` Greg KH
2018-09-05 15:10     ` Mark Brown
2018-09-05 15:10     ` Sasha Levin
2018-09-05 16:19     ` Guenter Roeck
2018-09-05 18:31     ` Laura Abbott
2018-09-05 21:23     ` Justin Forbes
2018-09-06  2:17     ` Eduardo Valentin
2018-09-04 21:33 ` Sasha Levin
2018-09-04 21:55   ` Guenter Roeck
2018-09-04 22:03     ` Laura Abbott
2018-09-04 23:14       ` Sasha Levin
2018-09-04 23:43         ` Guenter Roeck
2018-09-05  1:17           ` Laura Abbott
2018-09-06  3:56             ` Benjamin Gilbert
2018-09-04 21:58   ` Laura Abbott
2018-09-05  4:53     ` Sasha Levin
2018-09-05  6:48   ` Jiri Kosina
2018-09-05  8:16     ` Jan Kara
2018-09-05  8:32       ` Jiri Kosina
2018-09-05  8:56         ` Greg KH
2018-09-05  9:13           ` Geert Uytterhoeven
2018-09-05  9:33             ` Greg KH
2018-09-05 10:11           ` Mark Brown
2018-09-05 14:44             ` Steven Rostedt
2018-09-05  9:58         ` James Bottomley
2018-09-05 10:47           ` Mark Brown [this message]
2018-09-05 12:24             ` James Bottomley
2018-09-05 12:53               ` Jiri Kosina
2018-09-05 13:05                 ` Greg KH
2018-09-05 13:15                   ` Jiri Kosina
2018-09-05 14:00                     ` Greg KH
2018-09-05 14:06                     ` Sasha Levin
2018-09-05 21:02                       ` Jiri Kosina
2018-09-05 16:39                 ` James Bottomley
2018-09-05 17:06                   ` Dmitry Torokhov
2018-09-05 17:33                   ` Steven Rostedt
2018-09-05 13:03               ` Takashi Iwai
2018-09-05 13:27                 ` Daniel Vetter
2018-09-05 14:05                   ` Greg KH
2018-09-05 15:54                     ` Daniel Vetter
2018-09-05 16:19                       ` Sasha Levin
2018-09-05 16:26                         ` Daniel Vetter
2018-09-05 19:09                           ` Sasha Levin
2018-09-05 20:18                             ` Sasha Levin
2018-09-05 20:33                               ` Daniel Vetter
2018-09-05 14:20                 ` Sasha Levin
2018-09-05 14:30                   ` Takashi Iwai
2018-09-05 14:41                     ` Sasha Levin
2018-09-05 14:46                       ` Takashi Iwai
2018-09-05 14:54                         ` Sasha Levin
2018-09-05 15:12                           ` Takashi Iwai
2018-09-05 15:19                           ` Thomas Gleixner
2018-09-05 15:29                             ` Sasha Levin
2018-09-05 13:16               ` Mark Brown
2018-09-05 14:27                 ` Sasha Levin
2018-09-05 14:50                   ` Mark Brown
2018-09-05 15:00                     ` Sasha Levin
2018-09-05 10:28       ` Thomas Gleixner
2018-09-05 11:20         ` Jiri Kosina
2018-09-05 14:41           ` Thomas Gleixner
2018-09-05 15:18             ` Steven Rostedt
2018-09-06  8:48               ` Thomas Gleixner
2018-09-06 12:47                 ` Thomas Gleixner
2018-09-04 21:49 ` Guenter Roeck
2018-09-04 22:06   ` Laura Abbott
2018-09-04 23:35     ` Guenter Roeck
2018-09-05  1:45       ` Laura Abbott
2018-09-05  2:54         ` Guenter Roeck
2018-09-05  8:31           ` Jan Kara
2018-09-05  3:44 ` Eduardo Valentin

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