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Re: Proposal: B_ARRIER (addresses wapbl performance?)
On Tue, Dec 09, 2008 at 08:10:32PM +0100, Joerg Sonnenberger wrote:
> On Tue, Dec 09, 2008 at 10:14:25AM -0800, Jason Thorpe wrote:
> > Repeat: Ordered tags have nothing to do with whether or not a write is
> > committed to stable storage. But that is precisely what you want for a
> > write to a journal. FUA is the mechanism that is specifically intended
> > to get the behavior you want for a journal.
> For the journal we only want "written to stable storage before written
> the meta data blocks back".
If no files are open synchronously and nobody has called fsync(), yes.
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