On Sun, Feb 12, 2012 at 3:51 PM, Bjorn Helgaas [off-list ref] wrote:

quoted

quoted

I think it would be better to remove the bus resource from the tree,
change its "end," then re-insert it.

how about parent buses that have extended top?

I don't understand your question.  I assume you mean there's a case
where remove/update/reinsert doesn't work, but I don't see why that
would be a problem.  Can you show an example?

I mean parent busn_res already had several level's children busn_res.
and every level may have some siblings.
before remove will need to record those resources, to later to put them back.

that just increase not necessary complexity. because we already know
those resource could be extended safely.

Yinghai