linux-kernel - [PATCH v5 0/2] printk: Console owner and waiter logic cleanup

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Date:   Wed, 10 Jan 2018 14:24:16 +0100
From:   Petr Mladek <pmladek@...e.com>
To:     Steven Rostedt <rostedt@...dmis.org>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Cc:     akpm@...ux-foundation.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>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Jan Kara <jack@...e.cz>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        rostedt@...e.goodmis.org, Byungchul Park <byungchul.park@....com>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Tejun Heo <tj@...nel.org>, Pavel Machek <pavel@....cz>,
        linux-kernel@...r.kernel.org, Petr Mladek <pmladek@...e.com>
Subject: [PATCH v5 0/2] printk: Console owner and waiter logic cleanup

This is the last version of Steven's console owner/waiter logic.
Plus my proposal to hide it into 3 helper functions. It is supposed
to keep the code maintenable.

The handshake really works. It happens about 10-times even during
boot of a simple system in qemu with a fast console here. It is
definitely able to avoid some softlockups. Let's see if it is
enough in practice.

>From my point of view, it is ready to go into linux-next so that
it can get some more test coverage.

Steven's patch is the v4, see
https://lkml.kernel.org/r/20171108102723.602216b1@gandalf.local.home

Petr Mladek (1):
  printk: Hide console waiter logic into helpers

Steven Rostedt (1):
  printk: Add console owner and waiter logic to load balance console
    writes

 kernel/printk/printk.c | 156 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 155 insertions(+), 1 deletion(-)

-- 
2.13.6