Journaling UFS with gjournal.

[Pawel Jakub Dawidek]

On Mon, Jun 19, 2006 at 06:37:06AM -0700, R. B. Riddick wrote:
+> --- Pawel Jakub Dawidek <pjd at FreeBSD.org> wrote:
+> > 2. If we have file system, synchronize it.
+> > 3. Mark file system as clean.
+> > 4. Block all write requests to the file system.
+> >
+> Shouldn't we do 4. before 2.?

4 is done via vfs_write_suspend() function, which synchronize file
system once again.

+> Do we write _new_ blocks of a file via the journal or directly to the file
+> system (I mean: If we have a new file, that grows sequentially from 0 bytes to
+> 1GB, it would save some disc access, if we didn't write the data to the
+> journal)?

As I said gjournal is below file system layer. It receives I/O requests
only and cannot say which one is related to growing file, which has
metadata inside, etc.

-- 
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd at FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!
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