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Subject: Re: enable dynamic debug - doubt
To: Muni Sekhar <munisekharrms@gmail.com>, linux-kernel@vger.kernel.org
References: <CAHhAz+g_p9_RnsHtm5fODD29oTp-71cMR0Hk7yG3g+ARD9hEeQ@mail.gmail.com>
From: Peter Hurley <peter@hurleysoftware.com>
Message-ID: <564CE8E6.8060903@hurleysoftware.com>
Date: Wed, 18 Nov 2015 16:08:54 -0500
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On 11/17/2015 07:40 AM, Muni Sekhar wrote:
> [ Please keep me in CC as I'm not subscribed to the list]
> 
>  Hello,
> 
> The behaviour of dynamic debug prints are controlled via writing to a
> control file in the 'debugfs'
> filesystem(<debugfs>/dynamic_debug/control).

That's not the only method. You'll want to read
Documentation/dynamic-debug-howto.txt; specifically, "Debug Messages at
Module Initialization Time" for ways to enable dynamic debug messages at
module load time.

Regards,
Peter Hurley

> Here I would like to know what order should the echo(for eg: echo -n
> 'module sdhci +p' > /sys/kernel/debug/dynamic_debug/control) be
> applied in relation to the module load - before or after?


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