kernel defconfig, CONFIG_MTD_NAND_VERIFY_WRITE

Christoph Mair ml at chonyota.net
Fri Jan 8 14:29:38 CET 2010


On Friday 08 October 2010 15:27:21 you wrote:
> Hi, Cristoph.
> 
> something still (i mean from times Werner talking about) wrong with
> hardware ecc, I can't read/write mtdblock on 2.6.29.
> 
>                            mtd6-rd, mtd6-wt, mtdblock6-rd, mtdblock6-wt
> original (from old test):  5.2,     4.8,     2.6,          900kb/s
> with hw ecc + nonanddebug: 6.4,     4.9,     error    error
> 
> and got following errors while testing mtdblock (time dd
> if=/dev/mtdblock6 of=/dev/zero bs=256k count=200)
> 
> [21474773.805000] end_request: I/O error, dev mtdblock6, sector 256
> [21474773.805000] Buffer I/O error on device mtdblock6, logical block 32
> 
> i'll try to undertand how this happened, so wait with commit please.
I do not have commit rights anyway, so nothing to worry about ;) I'm just 
trying random stuff to find possible bottlenecks.

Christoph



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