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Re: Replace lockmgr for vnodes
On Sat, Jan 26, 2008 at 07:39:12PM +0000, David Holland wrote:
> On Sat, Jan 26, 2008 at 05:57:50PM +0000, Andrew Doran wrote:
> >> 4) I think we can rip out the "UPPER LOCK" stuff in layerfs. It dated
> >> when lower file systems didn't do locking. The only thing now that
> >> export a vn_lock is unionfs, which does do correct locking. Sorry, I've
> >> been meaning to kill it but haven't gotten to it.
> > Sounds like union-over-union should be prevented? I'll see about removing
> > it.
> It seems like if unionfs does proper locking, it ought to be able to
> take unions of anything, including other unionfses.
> Am I missing something?
And without we can't have more that 2 layers in the onion.
David Laight: david%l8s.co.uk@localhost
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