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From: Jason Lunz <lunz@falooley.org>
To: =?iso-8859-1?Q?J=F6rn?= Engel <joern@lazybastard.org>
Subject: Re: [PATCH] block2mtd oops in erase function.
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On Wed, Feb 21, 2007 at 04:02:18PM +0000, Jörn Engel wrote:
> If you enable CONFIG_JFFS2_SUMMARY, it should work for you.  Of course,
> your filesystem needs the summary, so you either have to do the
> backup&restore procedure or apply sumtool (is that its name?) to your
> images.

I thought I'd enabled CONFIG_JFFS2_SUMMARY, but it turns out not.
I've enabled it now, but I still don't seem to see any speedup.

I'm unclear on how to make the filesystem use it. I create the jffs2
filesystem by simply doing:

	flash_eraseall -j /dev/mtd0
	mount -t jffs2 mtd0 /state

Will this create a summary automatically, or is there an extra step I
need to take? 

...ah, it seems removing the -j does the trick. If I don't use it, mount
goes from >50s to <4s.

thanks!

Jason