command bootu to start kernel

[Marc Kleine-Budde]

On 10/29/2010 10:45 AM, Belisko Marek wrote:
> HI Baruch,
> 
> On Fri, Oct 29, 2010 at 10:34 AM, Baruch Siach <baruch at tkos.co.il> wrote:
>> Hi Belisko,
>>
>> On Fri, Oct 29, 2010 at 10:20:46AM +0200, Belisko Marek wrote:
>>> I have 2.6.32 kernel but early_printk isn't available and I enable
>>> lowlevel debugging but
>>> don't get nothing else on console. Anyway thanks.
>>
>> Try this patch to see the low level console output:
>>
>> commit 5c31454464ed655401c31c68c895b16eafd2bde5
>> Author: Baruch Siach <baruch at tkos.co.il>
>> Date:   Mon Jan 19 10:41:47 2009 +0200
>>
>>    arm, printk: the famous printascii() hack
>>
>> diff --git a/kernel/printk.c b/kernel/printk.c
>> index 5052b54..d685f8a 100644
>> --- a/kernel/printk.c
>> +++ b/kernel/printk.c
>> @@ -685,6 +685,10 @@ asmlinkage int vprintk(const char *fmt, va_list args)
>>        /* Emit the output into the temporary buffer */
>>        printed_len += vscnprintf(printk_buf + printed_len,
>>                                  sizeof(printk_buf) - printed_len, fmt, args);
>> +       {
>> +               extern void printascii(const char *);
>> +               printascii(printk_buf);
>> +       }
>>
>>
>>        /*
>>
>> --
>>                                                     ~. .~   Tk Open Systems
>> =}------------------------------------------------ooO--U--Ooo------------{=
>>   - baruch at tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -
>>
> Patch works like charm. Output from my kernel startup:
> 
> <5>Linux version 2.6.32-rc8 (open-nandra at linux) (gcc version 4.3.5
> (Buildroot 2010.08-rc1) ) #14 Fri Oct 29 10:40:20 CEST 2010
> CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177
> CPU: VIVT data cache, VIVT instruction cache
> Machine: MINI2440
> Memory policy: ECC disabled, Data cache writeback
> <7>On node 0 totalpages: 0
> <1>bootmem alloc of 32768 bytes failed!
> <0>Kernel panic - not syncing: Out of memory

do you have a "MEM=32" on your command line?

Marc

-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |

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