From dc2a7e57087864e3ea800ba9023352e2f4505ec8 Mon Sep 17 00:00:00 2001
From: hvlad <hvlad@users.sourceforge.net>
Date: Tue, 9 Jan 2018 17:52:35 +0200
Subject: [PATCH] Improvement CORE-5703 : When database validation fixes
 "orphan page" errors it also should adjust "lowest free page" marker
 (pip_min) on corresponding PIP, if necessary

---
 src/jrd/validation.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/jrd/validation.cpp b/src/jrd/validation.cpp
index f6115e3e33..c459dfb6ed 100644
--- a/src/jrd/validation.cpp
+++ b/src/jrd/validation.cpp
@@ -1370,6 +1370,13 @@ void Validation::garbage_collect()
 						CCH_MARK(vdr_tdbb, &window);
 						p[-1] |= 1 << (number & 7);
 						vdr_fixed++;
+
+						const ULONG bit = number - sequence * pageSpaceMgr.pagesPerPIP;
+						if (page->pip_min > bit)
+							page->pip_min = bit;
+
+						if (p[-1] == 0xFF && page->pip_extent > bit)
+							page->pip_extent = bit & ((ULONG)~7);
 					}
 					DEBUG;
 				}