From: David Woodhouse <dwmw2@infradead.org>
To: Adam Wozniak <adam.wozniak@comdev.cc>
Cc: linux-mtd@lists.infradead.org
Subject: Re: optimum geometry
Date: Mon, 21 Jan 2002 22:49:33 +0000 [thread overview]
Message-ID: <4896.1011653373@redhat.com> (raw)
In-Reply-To: <3C487D9A.D85DDC3D@comdev.cc>
adam.wozniak@comdev.cc said:
> I'm beginning to fear that this is far from optimum. What is an
> optimum erase block size?
As small as possible. The free space required by JFFS2 is measured in
blocks. It could probably be reduced to 2 or 3 blocks from the current 5/6
but will always be a straight multiple of blocksize, I think.
> I could drop back and rewrite the MTD driver to address each chip
> seperately, but I'm concerned that would be both messy and tough on
> performance.
By treating them as two pairs, you'll halve the write performance and also
halve the amount of wasted space. It's a tradeoff which you have to decide
on.
--
dwmw2
next prev parent reply other threads:[~2002-01-21 22:38 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20020118010528.A22777@swing.comdev.cc>
2002-01-18 16:41 ` need help interpreting debug output from JFFS2 Adam Wozniak
2002-01-18 16:55 ` David Woodhouse
2002-01-18 19:55 ` optimum geometry Adam Wozniak
2002-01-21 22:49 ` David Woodhouse [this message]
2002-01-22 10:21 ` Jörn Engel
2002-01-22 10:23 ` David Woodhouse
2002-01-22 12:00 ` Jörn Engel
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