[Yaffs] [Yaffs-archive] Re: YAFFS: opinions

[Nick Bane]

Sounds sane to me.

The only circumstance I can see where this would be confounded is if someone
deliberately writes to somewhere other than the first chunk of a block via
mtd (for example) for some clever reason (obscure form of embedding yaffs
unreadable data in a yaffs fs) knowing that yaffs will not overwrite it.

Nick

----- Original Message -----
From: "Charles Manning" <manningc2@actrix.gen.nz>
To: <yaffs@toby-churchill.org>
Sent: Monday, October 20, 2003 4:30 AM
Subject: YAFFS: opinions


> Hi YAFFSers
>
> I'd like to ask the opinion of YAFFS-land before I do something.
>
> One of the checks YAFFS currently does is to check that a chunk is fully
> erased before it is written to. In many ways this check is overkill
because
> the chunk is verified again after writing. There is a compile switch to
> disable this: CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK.
>
> Indeed, the only time I have ever seen this test trigger was due to a
stupid
> block management bug long since fixed.
>
> Clearly this check is a bit expensive time-wise So herewith a thought...
Most
> likely ??? this check will get triggered by some attempt to write to an
> unerased block. Therefore I wonder whether it makes sense to only do this
> check on the first chunk in every block. This would give some speed-up.
>
> Thoughts anyone?
>
> -- Charles
>
>
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