From 1b07b48c1abef0e5fdec19b0734fbf4bb1035f46 Mon Sep 17 00:00:00 2001
From: Howard Chu <hyc@symas.com>
Date: Fri, 2 Mar 2012 17:26:49 -0800
Subject: [PATCH] ITS#7196 use IOV_MAX if it's defined and small

---
 libraries/libmdb/mdb.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libraries/libmdb/mdb.c b/libraries/libmdb/mdb.c
index 925aae6..f028ecb 100644
--- a/libraries/libmdb/mdb.c
+++ b/libraries/libmdb/mdb.c
@@ -947,6 +947,10 @@ struct MDB_env {
 };
 	/** max number of pages to commit in one writev() call */
 #define MDB_COMMIT_PAGES	 64
+#if defined(IOV_MAX) && IOV_MAX < MDB_COMMIT_PAGES
+#undef MDB_COMMIT_PAGES
+#define MDB_COMMIT_PAGES	IOV_MAX
+#endif
 
 static MDB_page *mdb_page_alloc(MDB_cursor *mc, int num);
 static MDB_page *mdb_page_new(MDB_cursor *mc, uint32_t flags, int num);