Re: [PATCH] cowlinks v2

[Jamie Lokier]

Pavel Machek wrote:
> > > Could you not change it back to a normal inode when refcount becomes 1? 
> > 
> > You can only do that if the cowid object has a pointer to the last
> > remaining reference to it.  That's possible, but more complicated and
> > would incur a little more I/O per cow operation.
> 
> You'd have to have pointers to all references to it... because you
> can't tell in advance which one will be the last to go away.

Exactly.  Each of the cow pointers would need to be linked in a doubly
linked list containing them all.

-- Jamie
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