linux-kernel - Re: [PATCH v3] printk: Have printk() never buffer its data

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Message-ID: <CA+55aFzkX=jCC1O6+2oz8meswOqZQ+Q8Ao60q8eAS1G3AuEStQ@mail.gmail.com>
Date:	Mon, 25 Jun 2012 18:40:47 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Kay Sievers <kay@...y.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Joe Perches <joe@...ches.com>,
	"Paul E. McKenney" <paulmck@...ibm.com>
Subject: Re: [PATCH v3] printk: Have printk() never buffer its data

On Mon, Jun 25, 2012 at 5:56 PM, Kay Sievers <kay@...y.org> wrote:
>
> Buffering has nice effects though:
> It makes continuation lines appear as one record in the buffer, not as
> n individual prints with n headers.

As I already mentioned, buffering for *logging* is different from
buffering for *printing*.

I think it might be a great idea to buffer for logging in order to
generate one individual buffer record there.

But it needs to be printed as it is generated.

The printing and the recording really should be thought of as separate
issues. You already record things that aren't printed, so they already
aren't 1:1 relationships.

                     Linus
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