[U-Boot-Users] [PATCH] Bad block skipping for command nboot

Stefan Roese
2007-07-03T14:55:13Z

Hi Thomas,

On Tuesday 03 July 2007, Thomas Knobloch wrote:
> > And that's why I have to ask: Do we really need this command extension?
> > Why not just use a combination of commands (e.g. "nand read.jffs2
> > ...;bootm ...)?
>
> Using "nand read.jffs2 ...;bootm ..." has one disadvantage compared to the
> new "nboot.jffs2 ...". For the first command sequence u-boot has to read a
> fixed number of bytes from the NAND. You have to make big enough to support
> the largest possible image for your application. If the image is smaller
> u-boot will still have to read this fixed number of bytes.
> For "nboot" resp. "nboot.jffs2" u-boot will read only as much data from
> NAND as necessary. This might give some performance improvement.

Understood.

> BTW: when
> you ask for the need of the command "nboot.jffs2" you probably should
> question the pure "nboot" as well. It can be replaced by "nand read
> ...;bootm ..." as well.

Yep, correct. That's what was asking myself. I never used it so far.

Please resend the patch and I'll commit it to the NAND repository.

Thanks.