Re: ramfs/tmpfs for application partition

[Marco <marco.stornelli@coritel.it>]

Hi Jacob,

only another idea, why do you think to use a persistant ram filesystem
(like pramfs) mounted on /my/application/partition? If you use a simple
ram you can repopulate after a power off/on the directory with a simple
untar of the archive. In this way you haven't to repopulate the
filesystem after each reboot. What do you think about it? Could it be a
solution?

Marco

Jacob Avraham ha scritto:
>> Not sure I fully understand....
>>
>> You basically want two blobs -- the initramfs and the application?
>>
> Yes, I want to keep on the flash a stable, rarely changed, OS image, which is in initramfs
> format, and another application image, which is changing frequently.
> 
>> You can expand the initramfs by copying to it...so you mount the
>> application and run a script to copy it to initramfs before running it.
>>
> When you say 'you mount the application' it means that the application
> image on the flash has to be in some filesystem format, right? Like cramfs?
> On the other hand, if I want the application directory tree to reside
> in memory (and handle application persistency needs via the JFFS2 partition),
> maybe all I need is to keep a compressed tar image of the application on the flash,
> and untar it into /my/application/partition, which will be in initramfs?
> So I don't need to create another tmpfs filesystem as suggested in another post?
> Is there a better way to handle this?
> 
>> marty
>>
>>>   Hi,
>>>
>>>   I have a system with 128M RAM and a flash partitioned so that 10M
>> is
>>>   dedicated to initramfs image,
>>>   6M to application partition. And another 6M for JFFS2.
>>>   As I have plenty of RAM, I'd like to have my application directory
>>>   mounted on RAM, from a pre-populated
>>>   filesystem that resides in the 6M application partition.
>>>   So basically I want to use the same mechanism as initramfs, but
>> mounted
>>>   on /my/app/partition instead of root.
>>>   Does it make sense? How do I go about and do that?
>>>
>>>
>>>   Jacob Avraham
>>>
> 
> 
> 
>  
>  
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