linux-kernel - Re: 4.14 backport request for dbdda842fe96f: "printk: Add console owner and waiter logic to load balance console writes"

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Date:   Wed, 12 Dec 2018 16:43:37 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     Daniel Wang <wonderfly@...gle.com>
Cc:     Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>, stable@...r.kernel.org,
        Alexander.Levin@...rosoft.com,
        Andrew Morton <akpm@...ux-foundation.org>,
        byungchul.park@....com, dave.hansen@...el.com, hannes@...xchg.org,
        jack@...e.cz, linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Mel Gorman <mgorman@...e.de>, mhocko@...nel.org, pavel@....cz,
        penguin-kernel@...ove.sakura.ne.jp,
        Peter Zijlstra <peterz@...radead.org>, tj@...nel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>, vbabka@...e.cz,
        Cong Wang <xiyou.wangcong@...il.com>,
        Peter Feiner <pfeiner@...gle.com>
Subject: Re: 4.14 backport request for dbdda842fe96f: "printk: Add console
 owner and waiter logic to load balance console writes"

On Wed, Dec 12, 2018 at 12:11:29PM -0800, Daniel Wang wrote:
>On Wed, Dec 12, 2018 at 9:43 AM Sasha Levin <sashal@...nel.org> wrote:
>>
>> On Wed, Dec 12, 2018 at 10:59:39PM +0900, Sergey Senozhatsky wrote:
>> >On (12/12/18 14:36), Petr Mladek wrote:
>> >> > OK, really didn't know that! I wasn't Cc-ed on that AUTOSEL email,
>> >> > and I wasn't Cc-ed on this whole discussion and found it purely
>> >> > accidentally while browsing linux-mm list.
>> >>
>> >> I am sorry that I did not CC you. There were so many people in CC.
>> >> I expected that all people mentioned in the related commit message
>> >> were included by default.
>> >
>> >No worries! I'm not blaming anyone.
>> >
>> >> > So if you are willing to backport this set to -stable, then I wouldn't
>> >> > mind, probably would be more correct if we don't advertise this as a
>> >> > "panic() deadlock fix"
>> >>
>> >> This should not be a problem. I guess that stable does not modify
>> >> the original commit messages unless there is a change.
>> >
>> >Agreed.
>>
>> I'll be happy to add anything you want to the commit message. Do you
>> have a blurb you want to use?
>
>If we still get to amend the commit message, I'd like to add "Cc:
>stable@...r.kernel.org" in the sign-off area. According to
>https://www.kernel.org/doc/html/v4.12/process/stable-kernel-rules.html#option-1
>patches with that tag will be automatically applied to -stable trees.
>It's unclear though if it'll get applied to ALL -stable trees. For my
>request, I care at least about 4.19 and 4.14. So maybe we can add two
>lines, "Cc: <stable@...r.kernel.org> # 4.14.x" and "Cc:
><stable@...r.kernel.org> # 4.19.x".

We can't change the original commit message (but that's fine, the
purpose of that tag is to let us know that this commit should go in
stable - and no we do :) ).

I was under the impression that Sergey or Petr wanted to add more
information about the purpose of this patch and the issue it solves.

--
Thanks,
Sasha