[PATCH] cafe_nand: remove busy-wait loop

David Woodhouse dwmw2 at infradead.org
Wed Dec 10 17:05:39 EST 2008


On Wed, 2008-12-10 at 15:36 -0500, Chris Ball wrote:
> Hi John,
> 
>    > It's unfortunate that there's no "block device" way to access Flash
>    > chips in Linux without using a filesystem at all.  It's much easier
>    > to measure and tune I/O performance without a filesystem first,
>    > then see what (filesystem or driver) optimizations are required to
>    > make a particular filesystem fast on that device.

What's wrong with just reading from the character device /dev/mtd0?

> Does e.g. "dd if=mtd0 of=somefile bs=1M count=20" accomplish this?
> (When a program expects a block device argument, you can give a raw
> "mtd0" instead.)

No, that's only for mount.

-- 
David Woodhouse                            Open Source Technology Centre
David.Woodhouse at intel.com                              Intel Corporation




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