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From: Ferenc Wagner <wferi@niif.hu>
To: Arve =?utf-8?B?SGrDuG5uZXbDpWc=?= <arve@android.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org
Subject: Re: 2.6.29-rc2 dies on startup
References: <877i4rjw38.fsf@tac.ki.iif.hu>
	<20090125224625.96429d3d.akpm@linux-foundation.org>
	<d6200be20901261629y2e3d8804h16055b9497125371@mail.gmail.com>
Date: Wed, 28 Jan 2009 12:33:58 +0100
In-Reply-To: Ferenc Wagner's message of "Tue, 27 Jan 2009 18:15:31 +0100"
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Ferenc Wagner <wferi@niif.hu> writes:

> Arve Hjønnevåg <arve@android.com> writes:
>
>> On Sun, Jan 25, 2009 at 10:46 PM, Andrew Morton
>> <akpm@linux-foundation.org> wrote:
>>
>>> At a guess I'd say that drivers/staging/android/ram_console.c is calling
>>> the reed-solomon code earlier than it's expecting.  But that might be
>>> totally wrong.
>>
>> Yes, but it also is trying to use a zero sized buffer at virtual
>> address 0 so it will not work much better if you turn off ecc.
>
> This sounds understandable given that the defaults are
>
> CONFIG_ANDROID_RAM_CONSOLE_EARLY_ADDR=0x0
> CONFIG_ANDROID_RAM_CONSOLE_EARLY_SIZE=0x0
>
>> This patch (to the android kernel tree) add some validation:
>
> Compiling it now (on the vanilla tree).

Fine, this patch helps.  Instead of

[    0.000000] Detected 1536.828 MHz processor.
[    0.004000] Console: colour VGA+ 80x25
[    0.004000] console [ttyS0] enabled
[    0.004000] BUG: unable to handle kernel paging request at f000e816
[    0.004000] IP: [<c0190b5c>] kmem_cache_alloc+0x2d/0x95
[...]

now I get

[    0.000000] Detected 1537.027 MHz processor.
[    0.004000] Console: colour VGA+ 80x25
[    0.004000] console [tty0] enabled
[    0.004000] ram_console: buffer (null), invalid size 0, datasize -12
[    0.004000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
[...]
-- 
Thanks,
Feri.
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