Log Message:
-----------
Retry in FileRead and FileWrite if Windows returns ERROR_NO_SYSTEM_RESOURCES.
Also add a retry for Unixen returning EINTR, which hasn't been reported
as an issue but at least theoretically could be. Patch by Qingqing Zhou,
some minor adjustments by me.
Tags:
----
REL8_1_STABLE
Modified Files:
--------------
pgsql/src/backend/storage/file:
fd.c (r1.121.2.1 -> r1.121.2.2)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/storage/file/fd.c.diff?r1=1.121.2.1&r2=1.121.2.2)