linux-kernel - Re: [PATCH] [RFC] be more verbose when probing EDD

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Date:	Fri, 21 Dec 2007 17:48:54 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	devzero@....de, linux-kernel@...r.kernel.org, Matt.Domsch@...l.com
Subject: Re: [PATCH] [RFC] be more verbose when probing EDD

Andi Kleen wrote:
> "H. Peter Anvin" <hpa@...or.com> writes:
> 
>> devzero@....de wrote:
>>>         /* Query EDD information */
>>>  #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
>>> -       query_edd();
>>> +        printf("Probing EDD (query Bios for boot-device information)\n");
>>> +        printf("If boot hangs here, you may have a buggy Bios. Try edd=skipmbr or edd=off");
>>> +        query_edd();
>>> +        printf("\rOK                                                                       \n");
>>>  #endif
>> This is awfully verbose.
> 
> But useful. On the other hand we have lots of IMNSHO
> quite useless printks in early bootup that could be removed
> to make up for that
> 
> (e.g. candidates would be the 
> "CPU: After/before generic identify"
> or 
> Entering add_active_range....) 
> 
> printks and you can easily make up for the added verbosity.
> 

Those don't live in an area of memory which is hard-limited to 32K.

	-hpa
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