YAFFS2 doesn't compile

Andy Green andy at openmoko.com
Sun Apr 13 12:32:34 CEST 2008

Hash: SHA1

Somebody in the thread at some point said:
| On Saturday 12 April 2008 22:49:36 Andy Green wrote:
|> |   2.6.24 JFFS2 as such is pretty unstable.
|> |
|> | The same thread had a pointer to
|> | http://sourceforge.net/projects/mtd-mods.
|> | as a source for cherry-picking changes.
|> Hum.  NAND, bad blocks, dynamic partition tables, JFFS2, all things I
|> hope can go the same way as YAFFS2.
| Word!
| As much as I like to see that happening - do you have any figures
about power
| consumption of root-on-NAND vs. root-on-SD(-on-NAND)?

Probably "less" for root-on-NAND as it is... but we have at least two
possible levels of tricks we can play with SD card to reduce that.

One is to stop issuing the external clock to the card when we don't
transfer something (the cards have their own internal oscillators to
stay alive with), the second would need MCI layer support: to flat out
power down the card after a "spindown timeout" same as a laptop HDD, and
bring it up again when we transfer something next time.  Literally
remove power from it when idle... I guess it is pretty much idle after
boot unless the user starts a new app, etc.

- -Andy
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