Author: Filip Januš <fjanus@redhat.com>
Date: 6 Sep 2021
Related: https://bugzilla.redhat.com/show_bug.cgi?id=1992402

Changing the size to max if set in the environment.

Do it also every-time on aarch64 as this issue caused rpm to hang staring 8.4.0
(likely influenced by changes in other components) and rpm is not able to set
the environment this way.

diff -ur db-5.3.28/src/os/os_map.c db-patched/src/os/os_map.c
--- db-5.3.28/src/os/os_map.c	2013-09-09 17:35:09.000000000 +0200
+++ db-patched/src/os/os_map.c	2021-09-08 21:45:16.914146219 +0200
@@ -213,7 +213,14 @@
 	if (rp->max < rp->size)
 		rp->max = rp->size;
 	if (ret == 0 && F_ISSET(infop, REGION_CREATE)) {
-		if (F_ISSET(dbenv, DB_ENV_REGION_INIT))
+#ifdef HAVE_MLOCK
+        if (F_ISSET(env, ENV_LOCKDOWN))
+            rp->size = rp->max;
+#endif
+#if defined(__aarch64__)
+	    rp->size = rp->max;
+#endif
+        if (F_ISSET(dbenv, DB_ENV_REGION_INIT))
 			ret = __db_file_write(env, infop->fhp,
 			    rp->size / MEGABYTE, rp->size % MEGABYTE, 0x00);
 		else