linux-kernel - Re: [PATCH AUTOSEL for 4.14 015/161] printk: Add console owner and waiter logic to load balance console writes

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Message-ID: <20180503093214.GB32180@amd>
Date:   Thu, 3 May 2018 11:32:15 +0200
From:   Pavel Machek <pavel@....cz>
To:     Sasha Levin <Alexander.Levin@...rosoft.com>
Cc:     Steven Rostedt <rostedt@...dmis.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Petr Mladek <pmladek@...e.com>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Mel Gorman <mgorman@...e.de>, Michal Hocko <mhocko@...nel.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Peter Zijlstra <peterz@...radead.org>, Jan Kara <jack@...e.cz>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Byungchul Park <byungchul.park@....com>,
        Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH AUTOSEL for 4.14 015/161] printk: Add console owner and
 waiter logic to load balance console writes

Hi!

> >- It must be obviously correct and tested.
> >
> >If it introduces new bug, it is not correct, and certainly not
> >obviously correct.
> 
> As you might have noticed, we don't strictly follow the rules.

Yes, I noticed. And what I'm saying is that perhaps you should follow
the rules more strictly.

> Take a look at the whole PTI story as an example. It's way more than 100
> lines, it's not obviously corrent, it fixed more than 1 thing, and so
> on, and yet it went in -stable!
> 
> Would you argue we shouldn't have backported PTI to -stable?

Actually, I was surprised with PTI going to stable. That was clearly
against the rules. Maybe the security bug was ugly enough to warrant
that.

But please don't use it as an argument for applying any random
patches...

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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