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SubjectRe: RT and XFS
On Tue, Jul 12, 2005 at 05:41:43PM -0700, Daniel Walker wrote:
> On Wed, 2005-07-13 at 10:25 +1000, Nathan Scott wrote:
> > On Tue, Jul 12, 2005 at 04:01:32PM -0700, Daniel Walker wrote:
> > >
> > > Is there something so odd about the XFS locking, that it can't use the
> > > rt_lock ?
> >
> > Not that I know of - XFS does use the downgrade_write interface,
> > whose use isn't overly common in the rest of the kernel... maybe
> > that has caused some confusion, dunno.
>
> Current RT doesn't implement downgrade_write() , but it's trivial to add
> it.

Ah, thats probably it then.

> So it calls up_read if it has a read lock ? Or up_write if it has a
> write lock? I suppose it would be broken if it didn't though.

Thats correct.

cheers.

--
Nathan
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