On Tue, Jun 22, 2010 at 10:29:27PM +0200, Jan Kara wrote:
> With metadata which get journaled it should be quite easy. JBD already
> must know before you go and modify buffer contents - that's why
> journal_get_write_access and friends exist. It also makes sure that your
> data cannot be modified from the moment the buffer enters commit upto the
> moment the commit is finished. So you can use buffer commit hook to compute
> and store block checksum safely.
True, but we're also interested in making sure this feature can be
used in the non-journal case as well....
- Ted
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