Does ext2 based on MTD acceptable for Embedded Development?

Wolfgang Denk wd at
Mon Aug 30 18:13:19 EST 2004

In message <s1331f30.037 at EMAIL> you wrote:
> >> Is there an advantage to use ext2 instead of cramfs for read only fs?
> > Boot time, as you don't need to uncompress the stuff.
> Could you pls elaborate the choice of ex2 in the above scenario, instead of romfs. Was it to take advantage of the features that ext2 provides ?
> Romfs should have had a better bootup time than ext2/jffs2/cramfs.

Are you sure of this? Do you have actual benchmark data?

Also, romfs has some restrictions (owner and permission  information)
and  an  inefficient  design  (pages  read  from filesystem cannot be
executed directly because of 16 byte file header offset).

Best regards,

Wolfgang Denk

Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at
You see things; and you say ``Why?'' But I dream  things  that  never
were; and I say ``Why not?''
       - George Bernard Shaw _Back to Methuselah_ (1921) pt. 1, act 1

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