Thread: pgsql: Recursively fsync() the data directory after a crash.

Recursively fsync() the data directory after a crash.

Otherwise, if there's another crash, some writes from after the first
crash might make it to disk while writes from before the crash fail
to make it to disk.  This could lead to data corruption.

Back-patch to all supported versions.

Abhijit Menon-Sen, reviewed by Andres Freund and slightly revised
by me.

Branch
------
REL9_2_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/2bc3397168580a28a1f072bec46d395f4eb54c08

Modified Files
--------------
src/backend/access/transam/xlog.c |   41 +++++++++++++
src/backend/storage/file/fd.c     |  115 +++++++++++++++++++++++++++++++++++++
src/include/storage/fd.h          |    2 +
3 files changed, 158 insertions(+)