2011/5/5 Teodor Sigaev <teodor(at)sigaev(dot)ru>
>
> See several lines above:
> if (parent->blkno == InvalidBlockNumber)
>
> /*
> * end of chain and still didn't found parent, It's
> very-very
> * rare situation when root splited
> */
> break;
As I understood it's because we can't move root to another page.
----
With best regards,
Alexander Korotkov.