Carsten Haitzler (The Rasterman) raster at openmoko.org
Tue Jul 8 16:49:03 CEST 2008

On Tue, 08 Jul 2008 15:03:00 +0100 Andy Green <andy at openmoko.com> babbled:

> Hash: SHA1
> Somebody in the thread at some point said:
> | On Tue, 8 Jul 2008 14:35:13 +0200 "Michael 'Mickey' Lauer"
> | <mickey at vanille-media.de> babbled:
> |
> |> Am Dienstag 08 Juli 2008 12:45:12 schrieb Carsten Haitzler:
> |>> which brings me back to... we need a way to avoid jffs2 compression for
> |>> some types of files. eg: *.jpg, *.png, *.gif, *.edj, *.mp3 ... :)
> |> We should consider one of the alternatives to jffs2. The jury is
> still out on
> |> yaffs2 and ubifs is now in mainline.
> |
> | definitely. i'm no expert here... so.. what do people say? jffs2 works
> .. but
> | does have performance issues. it needs the ability to be able to be
> taught to
> | not compress some kinds of files. do we have anything of the sort out
> there?
> Jffs2 is just a symptom of writing direct to raw NAND...  we don't need
> to deal with these unusual formats when our storage is SD Card.  In that
> future, we use the very well characterized ext2 or ext3.

but that doesn't help- as such we have our OS on "on-chip" flash. that's where
it is. it's nastily slow (2mb/sec read rates is what i clocked on the mtdblock
devices themselves, so bypassing jffs2 overhead). am i wrong i suspecting our
flash SHOULD be much faster? (like 5-10x faster)? this is for freerunner.
future devices is... another matter :)

> - -Andy
> Version: GnuPG v1.4.9 (GNU/Linux)
> Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org
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> =l9bc

Carsten Haitzler (The Rasterman) <raster at openmoko.org>

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