linux-kernel - Re: Boot-time dynamic debugging?

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Message-ID: <AANLkTi=k5nkUk9LOS=EGHGSq=5Qe8_L-1d3_t9byxMrt@mail.gmail.com>
Date:	Mon, 2 Aug 2010 16:53:24 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	Jason Baron <jbaron@...hat.com>
Cc:	Greg KH <gregkh@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, trenn@...e.de
Subject: Re: Boot-time dynamic debugging?

> On Sun, Aug 01, 2010 at 03:10:40PM +0300, Pekka Enberg wrote:
>> Commit 346e15beb5343c2eb8216d820f2ed8f150822b08 ("driver core: basic
>> infrastructure for per-module dynamic debug messages") removed
>> "dynamic_printk" kernel parameter from the dynamic debugging subsystem
>> (and forgot to update Documentation/kernel-parameters.txt). How can I
>> use the new subsystem for enabling boot-time dev_dbg() calls for
>> non-modular kernels?

On Mon, Aug 2, 2010 at 4:47 PM, Jason Baron <jbaron@...hat.com> wrote:
> Right now, you can not enable them dynamically from the boot command
> line (only via the debugfs file). However, Thomas Renninger, has posted
> a series to add back the boot-time functionality, see:
>
> Subject:    [patch 0/3] Dynamic Debug providing early boot debug messages via
> boot parameter
> http://marc.info/?l=linux-kernel&m=127970474426120&w=2
>
> So I intend to queue those up for 2.6.36, and also update the
> documentation.

Oh, great!

Acked-by: Pekka Enberg <penberg@...helsinki.fi>

Btw, can you easily enable all dev_dbg() calls with the boot parameter?
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