linux-mtd: ubiattach taking long time

[Richard Weinberger]

Pintu,

----- Ursprüngliche Mail -----
> Von: "Pintu Agarwal" <pintu.ping at gmail.com>
> I have tried using fastmap as well, but still no difference.
> Are there any other techniques to improve the ubiattach timing ?
> 
> Logs:
> ----------
> Doing from initramfs:
> {{{
> [    6.949143][  T214] ubi0: attaching mtd54
> [    8.023766][  T214] ubi0: scanning is finished

No fastmap attach here.

Make sure to set fm_autoconvert:
http://www.linux-mtd.infradead.org/doc/ubi.html#L_fastmap
If set, UBI create after a few writes a fastmap.

Speaking of other techniques, you can improve scanning time also by
tuning UBI for your NAND controller/setup.
E.g. transferring only the amount of bytes needed for an header.
Or reading without ECC and re-reading with ECC if the header CRC-check fails.

Thanks,
//richard