linux-kernel - Re: [PATCH v12 0/3] printk: Make printk() completely async

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Date:	Wed, 29 Jun 2016 14:32:07 +0900
From:	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:	Joe Perches <joe@...ches.com>
Cc:	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	Petr Mladek <pmladek@...e.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jan Kara <jack@...e.com>, Tejun Heo <tj@...nel.org>,
	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	linux-kernel@...r.kernel.org,
	Byungchul Park <byungchul.park@....com>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: Re: [PATCH v12 0/3] printk: Make printk() completely async

On (06/28/16 22:16), Joe Perches wrote:
> On Wed, 2016-06-29 at 14:08 +0900, Sergey Senozhatsky wrote:
> > the patch to fix the async KERN_CONT printk regression I mentioned
> > several days ago in another thread.
> 
> KERN_CONT is effectively a no-op.
> This is any printk without a KERN_<LEVEL>

if the message has no LOG_NEWLINE in flags then it's stored as LOG_CONT
in log buffer, but before getting there it sits in cont buffer. and those
are usually KERN_CONT messages that don't have LOG_NEWLINE in flags. may
be the wording is not exactly correct in the original message.

	-ss