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

From: Tejun Heo
Date: Tue Apr 28 2015 - 10:10:27 EST

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?


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