commit 762ebb8f6ecfb36b9976bb9aa87d0a7f8fb601b4
Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
Date:   Wed Sep 25 17:03:28 2013 -0300

    Set checksum to new revmap pages
    
    per Erik Rijkers

diff --git a/src/backend/access/minmax/mmrevmap.c b/src/backend/access/minmax/mmrevmap.c
index 43bff95..5ff5ca2 100644
--- a/src/backend/access/minmax/mmrevmap.c
+++ b/src/backend/access/minmax/mmrevmap.c
@@ -323,6 +323,7 @@ mmRevmapExtend(mmRevmapAccess *rmAccess, BlockNumber blkno)
 	while (blkno >= rmAccess->physPagesInRevmap)
 	{
 		extended = true;
+		PageSetChecksumInplace(page, blkno);
 		smgrextend(rmAccess->idxrel->rd_smgr, MM_REVMAP_FORKNUM,
 				   rmAccess->physPagesInRevmap, page, false);
 		rmAccess->physPagesInRevmap++;