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SubjectRe: XFS to main kernel source
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> On Sep 20, 2001  16:31 -0500, Steve Lord wrote:
> > XFS quotas are transactional, when space is added to a file the quota is
> > adjusted in the same transaction. It is fairly hard to do this without your
> > own quota code.
>
> Actually not. The quotas in ext3 are transactional as well. It's just
> that the "ext3" journal layer allows nested transactions, so it is possible
> to start a write transaction, call into the journal code which calls back
> into the ext3 write code to start a nested transaction on the journal file
> (i.e. it is in the same transaction as the initial write), and then the
> initial write completes.

OK, good point, but doing a major rewrite of XFS to use a different
transaction mechanism is not really on the cards, plus we have on disk
compatibility with the Irix version to consider.

Steve



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