pgsql/src backend/access/heap/heapam.c backend ...

CVSROOT:    /home/projects/pgsql/cvsroot
Module name:    pgsql
Changes by:    tgl@hub.org    01/06/29 17:08:25

Modified files:
    src/backend/access/heap: heapam.c hio.c
    src/backend/access/transam: xlogutils.c
    src/backend/catalog: heap.c
    src/backend/commands: sequence.c
    src/backend/storage/buffer: bufmgr.c
    src/backend/storage/freespace: freespace.c
    src/backend/storage/smgr: smgr.c
    src/backend/utils/cache: relcache.c
    src/include/access: hio.h
    src/include/storage: bufmgr.h
    src/include/utils: relcache.h

Log message:
    Further work on connecting the free space map (which is still just a
    stub) into the rest of the system.  Adopt a cleaner approach to preventing
    deadlock in concurrent heap_updates: allow RelationGetBufferForTuple to
    select any page of the rel, and put the onus on it to lock both buffers
    in a consistent order.  Remove no-longer-needed isExtend hack from
    API of ReleaseAndReadBuffer.