linux-kernel - Re: [PATCH 04/16] printk: implement support for extended console drivers

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Message-ID: <20150428141014.GF2152@htj.duckdns.org>
Date:	Tue, 28 Apr 2015 10:10:14 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Petr Mladek <pmladek@...e.cz>
Cc:	akpm@...ux-foundation.org, davem@...emloft.net,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	Kay Sievers <kay@...y.org>
Subject: Re: [PATCH 04/16] printk: implement support for extended console
 drivers

Hello, Petr.

On Tue, Apr 28, 2015 at 11:42:44AM +0200, Petr Mladek wrote:
> Note that cont buffer is only a memory optimization. You could put
> every text snippet into the ring buffer and console immediately.
> You need to set LOG_CONT instead of LOG_NEWLINE flag. This is
> already used when the line is too long for the cont buffer or
> when there is printed a message from another cpu in the middle
> of a continuing message.

Yeah, hmmm, I wonder whether the right solution here is to bypass cont
buffer if ext_console is present.  This would use a bit more memory
and hurt users catting /proc/kmsg but everyone else should be able to
get the same result and things get a lot simpler on both sending and
receiving sides.  What do you think?

Thanks.

-- 
tejun
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