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References: <20180927194601.207765-1-wonderfly@google.com> <20181001152324.72a20bea@gandalf.local.home>
In-Reply-To: <20181001152324.72a20bea@gandalf.local.home>
From:   Daniel Wang <wonderfly@google.com>
Date:   Mon, 1 Oct 2018 13:37:30 -0700
Message-ID: <CAJmjG29Jwn_1E5zexcm8eXTG=cTWyEr1gjSfSAS2fueB_V0tfg@mail.gmail.com>
Subject: Re: 4.14 backport request for dbdda842fe96f: "printk: Add console
 owner and waiter logic to load balance console writes"
To:     rostedt@goodmis.org
Cc:     stable@vger.kernel.org, pmladek@suse.com,
        Alexander.Levin@microsoft.com, akpm@linux-foundation.org,
        byungchul.park@lge.com, dave.hansen@intel.com, hannes@cmpxchg.org,
        jack@suse.cz, linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        mathieu.desnoyers@efficios.com, mgorman@suse.de, mhocko@kernel.org,
        pavel@ucw.cz, penguin-kernel@i-love.sakura.ne.jp,
        peterz@infradead.org, tj@kernel.org, torvalds@linux-foundation.org,
        vbabka@suse.cz, xiyou.wangcong@gmail.com,
        Peter Feiner <pfeiner@google.com>
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On Mon, Oct 1, 2018 at 12:23 PM Steven Rostedt <rostedt@goodmis.org> wrote:
>
> > Serial console logs leading up to the deadlock. As can be seen the stack trace
> > was incomplete because the printing path hit a timeout.
>
> I'm fine with having this backported.

Thanks. I can send the cherrypicks your way. Do you recommend that I
include the three follow-up fixes though?

c14376de3a1b printk: Wake klogd when passing console_lock owner
fd5f7cde1b85 printk: Never set console_may_schedule in console_trylock()
c162d5b4338d printk: Hide console waiter logic into helpers
dbdda842fe96 printk: Add console owner and waiter logic to load
balance console writes

>
> -- Steve


-- 
Best,
Daniel

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