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

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Message-ID: <1340810283.16702.19.camel@gandalf.stny.rr.com>
Date:	Wed, 27 Jun 2012 11:18:03 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Kay Sievers <kay@...y.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andrew Morton <akpm@...ux-foundation.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 Wed, 2012-06-27 at 11:13 -0400, Steven Rostedt wrote:

> I just tested this patch and it boots fine for me.

Of course after sending this, I rebooted to the same kernel and it
locked up :-p

Ends with:

[   47.966454] microcode: Microcode Update Driver: v2.00 <tigran@...azian.fsnet.co.uk>, Peter Oruba
[   48.188791] kvm: disabled by bios
[   48.352547] snd_hda_intel 0000:00:1b.0: irq 44 for MSI/MSI-X
[   48.410944] ALSA hda_auto_parser.c:322 autoconfig: line_outs=4 (0xd/0xf/0x10/0x11/0x0) type:line
[   48.419774] ALSA hda_auto_parser.c:326    speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[   48.427012] ALSA hda_auto_parser.c:330    hp_outs=1 (0xa/0x0/0x0/0x0/0x0)
[   48.433848] ALSA hda_auto_parser.c:331    mono: mono_out=0x0
[   48.439523] ALSA hda_auto_parser.c:334    dig-out=0x21/0x0
[   48.445023] ALSA hda_auto_parser.c:335    inputs:[   48.449562] ALSA hda_auto_parser.c:339  Front Mic=0xb[   48.454451] ALSA hda_auto_parser.c:339  Rear Mic=0xe[   48.459258] ALSA hda_auto_parser.c:339  Line=0xc

-- Steve

>  Better still, I put
> in my 'delay' to make sure the output shows up as it is printed, and it
> seems to do so.
> 
> Tested-by: Steven Rostedt <rostedt@...dmis.org>


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