linux-kernel - Re: [PATCH] kmemtrace: fix kernel parameter documentation

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Date:	Tue, 26 May 2009 08:23:46 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Pekka Enberg <penberg@...helsinki.fi>
CC:	mingo@...e.hu, eduard.munteanu@...ux360.ro,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kmemtrace: fix kernel parameter documentation

Pekka Enberg wrote:
> From: Pekka Enberg <penberg@...helsinki.fi>
> 
> The kmemtrace.enable kernel parameter no longer works. To enable
> kmemtrace at
> boot-time, you must pass "ftrace=kmemtrace" instead.

Can someone also list the possible tracers in the ftrace= area, please?

	ftrace=[tracer]
			[ftrace] will set and start the specified tracer
			as early as possible in order to facilitate early
			boot debugging.

Thanks.

> Cc: Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>
> Signed-off-by: Pekka Enberg <penberg@...helsinki.fi>
> ---
>  Documentation/kernel-parameters.txt |   10 ----------
>  1 files changed, 0 insertions(+), 10 deletions(-)
> 
> diff --git a/Documentation/kernel-parameters.txt
> b/Documentation/kernel-parameters.txt
> index e87bdbf..9243dd8 100644
> --- a/Documentation/kernel-parameters.txt
> +++ b/Documentation/kernel-parameters.txt
> @@ -56,7 +56,6 @@ parameter is applicable:
>      ISAPNP    ISA PnP code is enabled.
>      ISDN    Appropriate ISDN support is enabled.
>      JOY    Appropriate joystick support is enabled.
> -    KMEMTRACE kmemtrace is enabled.
>      LIBATA  Libata driver is enabled
>      LP    Printer support is enabled.
>      LOOP    Loopback device support is enabled.
> @@ -1054,15 +1053,6 @@ and is between 256 and 4096 characters. It is
> defined in the file
>              use the HighMem zone if it exists, and the Normal
>              zone if it does not.
> 
> -    kmemtrace.enable=    [KNL,KMEMTRACE] Format: { yes | no }
> -                Controls whether kmemtrace is enabled
> -                at boot-time.
> -
> -    kmemtrace.subbufs=n    [KNL,KMEMTRACE] Overrides the number of
> -            subbufs kmemtrace's relay channel has. Set this
> -            higher than default (KMEMTRACE_N_SUBBUFS in code) if
> -            you experience buffer overruns.
> -
>      kgdboc=        [HW] kgdb over consoles.
>              Requires a tty driver that supports console polling.
>              (only serial suported for now)


-- 
~Randy
LPC 2009, Sept. 23-25, Portland, Oregon
http://linuxplumbersconf.org/2009/
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