RE: File systems in embedded devices

RE: File systems in embedded devices

[Mikael Starvik]

We use JFFS2 for configuration parameters etc, cramfs for 
binaries etc  and tmpfs for temporary data (our embedded 
devices typically have 4 MB flash and 16 MB RAM).

/Mikael

-----Original Message-----
From: linux-kernel-owner@vger.kernel.org
[mailto:linux-kernel-owner@vger.kernel.org]On Behalf Of Nandakumar
NarayanaSwamy
Sent: Saturday, February 08, 2003 3:20 PM
To: linux-kernel@vger.kernel.org
Subject: File systems in embedded devices


Dear All,

We are developing a embedded device based on linux. Through the 
development phase we used NFS. But now we want to move some 
filesystem
which can be created in FLASH/RAM.

I have few doubts about the file system in embedded devices.

1) What is the file system which is used normally in all embedded 
devices? (JFFS/CRAMFS/RAM DISK)

2) We tried using RAM disk as the file system. But since our 
application is huge it is not able to fit into 8 MB RAM disk 
created. When we tried to increase the size of the RAM disk, the 
kernel crashes above 9 MB. We have 32 MB in our target board.

3) I dont know whether we can use cramfs.

Can anybody suggest me some ideas so that i can solve these 
issues?

Thanks and Regards,
Nanda

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Re: File systems in embedded devices

[David Woodhouse]

On Sat, 2003-02-08 at 14:20, Nandakumar NarayanaSwamy wrote:
> Dear All,
> 
> We are developing a embedded device based on linux. Through the 
> development phase we used NFS. But now we want to move some 
> filesystem which can be created in FLASH/RAM.

Which? Flash or RAM?

> Can anybody suggest me some ideas so that i can solve these 
> issues?

You need to give at least _some_ indication of your requirements --
what's on your file system, what is the expected pattern of access to
it, do you require write access all the time or only occasional updates
of the whole system, etc. ?


-- 
dwmw2

File systems in embedded devices

[Nandakumar NarayanaSwamy]

Dear All,

We are developing a embedded device based on linux. Through the 
development phase we used NFS. But now we want to move some 
filesystem
which can be created in FLASH/RAM.

I have few doubts about the file system in embedded devices.

1) What is the file system which is used normally in all embedded 
devices? (JFFS/CRAMFS/RAM DISK)

2) We tried using RAM disk as the file system. But since our 
application is huge it is not able to fit into 8 MB RAM disk 
created. When we tried to increase the size of the RAM disk, the 
kernel crashes above 9 MB. We have 32 MB in our target board.

3) I dont know whether we can use cramfs.

Can anybody suggest me some ideas so that i can solve these 
issues?

Thanks and Regards,
Nanda