commit ec5a7769d5c05542d12fc21afa25f32360db7de4
Author: Jan Kratochvil <jan.kratochvil@redhat.com>
Date:   Wed May 12 22:00:46 2010 +0200

    Fix mb_reserve:
    	https://bugzilla.redhat.com/show_bug.cgi?id=590635

diff --git a/gdb/testsuite/gdb.base/vla-overflow.exp b/gdb/testsuite/gdb.base/vla-overflow.exp
index 7203a48..24a608f 100644
--- a/gdb/testsuite/gdb.base/vla-overflow.exp
+++ b/gdb/testsuite/gdb.base/vla-overflow.exp
@@ -66,7 +66,8 @@ proc memory_v_pages_get {} {
 
 set pages_found [memory_v_pages_get]
 
-set mb_reserve 10
+# s390x with glibc-debuginfo.s390x installed used approx. 16MB.
+set mb_reserve 40
 verbose -log "pages_found = $pages_found, mb_reserve = $mb_reserve"
 set kb_found [expr $pages_found * $pagesize / 1024]
 set kb_permit [expr $kb_found + 1 * 1024 + $mb_reserve * 1024]