flashdisk heap requirements

[Sebastian Huber]

On 03/13/2013 05:22 PM, Matthew J Fletcher wrote:
> Hi,
>
> I have setup a flashdisk device, the segment descriptor, defines a size of 64k
> and a count of 32 (although i am not 100% sure what the count means). I have a
> 512 block size in the flashdisk configuration.
>
> In rtems_flashdisk_initalize() the code calloc()'s the size of blocks as
> calculated by rtems_fdisk_blocks_in_device(), for the example above this
> results in calloc(4032,8) a request of 32256 !, thats 50% of the NOR size.
> Actually i would like a 6MB filesystem on a 16MB NOR chip.

This table maps the bdbuf block to the corresponding flash page.  If you want 
to reduce the runtime memory demands, then you have to improve the data 
structures in the flash disk driver.

-- 
Sebastian Huber, embedded brains GmbH

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