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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Message-ID: <CAJmjG29JTboAWTzyEiix-aA-2NvkwAOEygKAwq3pB18RO+Etfg@mail.gmail.com>
Date:   Mon, 1 Oct 2018 13:38:49 -0700
From:   Daniel Wang <wonderfly@...gle.com>
To:     vbabka@...e.cz
Cc:     pavel@....cz, rostedt@...dmis.org, stable@...r.kernel.org,
        pmladek@...e.com, Alexander.Levin@...rosoft.com,
        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@...icios.com, mgorman@...e.de, mhocko@...nel.org,
        penguin-kernel@...ove.sakura.ne.jp, peterz@...radead.org,
        tj@...nel.org, torvalds@...ux-foundation.org,
        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 Mon, Oct 1, 2018 at 1:23 PM Vlastimil Babka <vbabka@...e.cz> wrote:
>
> On 10/1/18 10:13 PM, Pavel Machek wrote:
> >
> > Dunno. Is the patch perhaps a bit too complex? This is not exactly
> > trivial bugfix.
> >
> > pavel@duo:/data/l/clean-cg$ git show dbdda842fe96f | diffstat
> >  printk.c |  108
> >  ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
> >
> > I see that it is pretty critical to Daniel, but maybe kernel with
> > console locking redone should no longer be called 4.4?
>
> In that case it probably should no longer be called 4.4 since at least
> Meltdown/Spectre fixes :)

To clarify, I am requesting a backport to 4.14. This bug doesn't repro on 4.4.

>


-- 
Best,
Daniel

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