linux-kernel - Re: [PATCH RESEND 1/3] printk: convert byte-buffer to variable-length record buffer

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Date:	Fri, 11 May 2012 17:22:32 +0200
From:	Sasha Levin <levinsasha928@...il.com>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	Kay Sievers <kay@...y.org>, Yinghai Lu <yinghai@...nel.org>,
	Joe Perches <joe@...ches.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND 1/3] printk: convert byte-buffer to variable-length
 record buffer

On Fri, May 11, 2012 at 5:19 PM, Greg KH <gregkh@...uxfoundation.org> wrote:
> On Fri, May 11, 2012 at 12:35:07PM +0200, Sasha Levin wrote:
>> This has a small issue with the way timing is printed compared to how
>> it worked previously.
>>
>> Consider the following case:
>>
>>     printk("\n foo \n bar \n zoot")
>>
>> Previously, you would see timing on each line of the print, but now
>> you see it only on the first.
>
> What code does this?  Shouldn't those be individual printk lines?  I
> didn't think that type of line would ever work properly in the past.

At least the lockdep code, in several places:

        __print_lock_name(safe_class);
        printk(");\n");
        printk("\n *** DEADLOCK ***\n\n");

Which has looked fine before.
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