Fix a couple of bugs with wal_log_hints.
1. Replay of the WAL record for setting a bit in the visibility map
contained an assertion that a full-page image of that record type can only
occur with checksums enabled. But it can also happen with wal_log_hints, so
remove the assertion. Unlike checksums, wal_log_hints can be changed on the
fly, so it would be complicated to figure out if it was enabled at the time
that the WAL record was generated.
2. wal_log_hints has the same effect on the locking needed to read the LSN
of a page as data checksums. BufferGetLSNAtomic() didn't get the memo.
Backpatch to 9.4, where wal_log_hints was added.
Branch
------
REL9_4_STABLE
Details
-------
http://git.postgresql.org/pg/commitdiff/b6c4b58ac52aa9046c45bd8c2c9fc8925087c8d3
Modified Files
--------------
src/backend/access/heap/heapam.c | 15 +++++++--------
src/backend/storage/buffer/bufmgr.c | 2 +-
2 files changed, 8 insertions(+), 9 deletions(-)
