Re: [U-Boot] [PATCH 1/2] mtd: denali: improve nand_read_oob and fix nand_write_oob

On Fri, 2014-04-18 at 20:30 +0900, Masahiro Yamada wrote:

[2] Make denali_read_oob() 10x faster.

One of the fatal issues of v7 is "nand bad" command is extremely slow.

This is the benchmark of v7

=> time nand bad

Device 0 bad blocks:

time: 11.300 seconds, 11300 ticks

It is really really painful to wait more than 10 seconds just for bad block scanning to boot Linux.

Making bad block scans faster is a good thing, but why do you need to scan them just to boot Linux? Aren't you using an on-flash BBT?

-Scott