On 17.07.2012 21:25, Arne Jansen wrote:

On 07/17/2012 08:33 PM, Alex Lyakas wrote:

quoted

extent? Also, how do we encounter roots (which is what we need in the
output) during this walking? Hope you can shed some light, or you can

iirc the root backreferences itself, which is the criterion that we
found a root.

As all the backref walking code, this differs between shared backrefs
and indirect backrefs, too. In general, the criterion is: We've got a
backref with a positive refcount, we've got a root id set for it, and we
determined that this block has no parent block.

See where find_parent_nodes adds to the "roots" ulist.

quoted

let me continue digging in the code:)

Please do so :-)

-Jan