I found one problem in the 0002 patch. The patch changes the recovery so that it creates .done files for every WAL files which exist in pg_xlog directory at the end of recovery. But even WAL files which will have to be archived later can exist in pg_xlog at that moment. For example, the latest, recycled and fully-written-but-not-archived-yet (i.e., maybe having .ready files) WAL files. The patch wrongly prevents them from being archived at all.
Re-looking at patch 2, yes you are right. Even if it was mentioned that we should do that for a node that had promotion triggered it was not done this way as a check on CheckForStandbyTrigger() is actually missing. Attached is an updated patch.
ISTM that the 0001 patch has the similar problem. Please imagine the following scenario. In this case, the patch seems to make the restartpoint recycle even WAL files which have .ready files and will have to be archived later. Thought?
Right, that's really backward. This was the approach taken before c9cc7e0, and this commit actually prevents removal of unarchived WAL files during recovery.
