Increase L4linux ramdisk size ?

Julien HEYMAN bidsomail at gmail.com
Thu Mar 31 22:40:29 CEST 2011


Thank you for the prompt reply. I don't have access to my Beagleboard right now, but I'll redo the test and capture the full boot log as soon as I can.

Julien

On Mar 31, 2011, at 6:55 PM, Adam Lackorzynski wrote:

> Hi,
> 
> On Thu Mar 31, 2011 at 12:16:05 +0200, Julien Heyman wrote:
>> I am using Fiasco.OC/L4Re/L4Linux on a Beagleboard. After having
>> successfully used/customized the L4Linux ramdisk provided as part of the
>> snapshot, I created a larger ramdisk (8Mb instead of ~3Mb) from scratch and
>> adjusted the "ramdisk_size" option on the linux boot args line in my LUA
>> script, and rebuilt my u-boot image. I then get plenty of errors during
>> linux boot, starting with:
>> 
>> RAMDISK: ext2 filesystem found at block 0
>> RAMDISK: Loading 8000KiB [1 disk] into ram disk... l4linux1| Non-resolvable
>> page fault at e0d1619, ip 170384.
>> l4linux1| Page fault (non-resolved): pfa=e0d1619 pc=170384
>> l4linux1| Non-resolvable page fault at e0d161a, ip 170384.
>> 
>> Internal error: Boom!: 410005 [#1]
>> etc...
>> 
>> My questions:
>> - is there a specific way to create a ramdisk file for l4linux, and/or
>> specific constraints on the ramdisk size ?
> 
> No specific way. Ramdisk size should not exceed half of the memory given
> to L4Linux itself. This should not happen to you as there's a check
> preventing this pitfall.
> 
>> - am I missing other configuration parameters than ramdisk_size that should
>> be adjusted to reflect the larger ramdisk size ?
> 
> No, ramdisk_size is enough. There's something different happening here.
> Can you tell me where 0x170384 is in the binary? Probably the backtrace
> was printed. Is there anything strange in the bootup log?
> 
> 
> 
> Adam
> -- 
> Adam                 adam at os.inf.tu-dresden.de
>  Lackorzynski         http://os.inf.tu-dresden.de/~adam/
> 
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