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Re: [Newbie] Few Queries related to JFFS2



On Fri, 2004-12-03 at 09:10, S Ashok wrote:
> Hi all,
> 
> I am working on embedded project where we are using 
> root filesystem with jffs2 filesystem type( 4MB NOR 
> FLASH). I have few queries related to it.
> 
> 1. Is the erase block size specified while creating jffs2 
>    image should be same as that of flash block size ?

In general, yes.

> 
> 2. I have read from the mailing list that free space has to 
>    be left for proper functioning of GC  ( hideing them from 
>    userspace ). Is there any number ( one or two erase block 
>    ) ?

JFFS2 figures this out when it mounts.  The old hard coded method used 5
eraseblocks.  To be safe, I would recommend starting with 5 free.

IIRC, JFFS2 will just mount the filesystem read-only if it doesn't have
enough free eraseblocks.

josh


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