linux-kernel - Re: [PATCH 2/3] early_printk: Add force_early

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Message-ID: <ecbb8f76-f397-6916-a811-febb10518498@infradead.org>
Date:   Thu, 28 Sep 2017 10:05:15 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     pmladek@...e.com, sergey.senozhatsky@...il.com,
        linux-kernel@...r.kernel.org, rostedt@...dmis.org,
        mingo@...nel.org, tglx@...utronix.de
Subject: Re: [PATCH 2/3] early_printk: Add force_early_printk kernel parameter

On 09/28/17 09:07, Peter Zijlstra wrote:
> On Thu, Sep 28, 2017 at 08:41:37AM -0700, Randy Dunlap wrote:
> 
>> Please add that kernel parameter to Documentation/admin-guide/kernel-parameters.txt.
> 
> Something like so?

Yes, thanks. Ack.

> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -1165,6 +1165,11 @@
>  			parameter will force ia64_sal_cache_flush to call
>  			ia64_pal_cache_flush instead of SAL_CACHE_FLUSH.
>  
> +	force_early_printk
> +			Forcefully uses early_console (as per earlyprintk=)
> +			usage for regular printk, bypassing everything,
> +			including the syslog (dmesg will be empty).
> +
>  	forcepae [X86-32]
>  			Forcefully enable Physical Address Extension (PAE).
>  			Many Pentium M systems disable PAE but may have a
> 


-- 
~Randy