On Fri, Feb 15, 2008 at 03:20:10PM +0100, Andi Kleen wrote:
quoted text
> On Fri, Feb 15, 2008 at 04:07:54PM +0300, Michael Tokarev wrote:
> > I wonder if it's worth the effort to try to implement this.

My personal view (which seems to be in the minority) is that it's a
waste of our development time *except* in the (rare?) cases similar to
the ones Andi is talking about.

But the decision has already been made for us in the block layer: 
dm is now pretty much required to support (zero-length) barriers.
Unfortunately we didn't get this finished in time for 2.6.25, but we
intend to get it done for 2.6.26:  Woe betide any callers today that
don't handle EOPNOTSUPP!

Alasdair
-- 
agk@redhat.com
--
unsubscribe notice
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/