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From: Peter Holm <pho@FreeBSD.org>
Date: Wed, 8 Jul 2015 16:20:21 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-user@freebsd.org
Subject: svn commit: r285276 - user/pho/stress2/misc
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Author: pho
Date: Wed Jul  8 16:20:20 2015
New Revision: 285276
URL: https://svnweb.freebsd.org/changeset/base/285276

Log:
  Test scenario would seg fault on i386.
  
  Diagnosed by:	kib
  Sponsored by:	EMC / Isilon storage division

Modified:
  user/pho/stress2/misc/datamove2.sh

Modified: user/pho/stress2/misc/datamove2.sh
==============================================================================
--- user/pho/stress2/misc/datamove2.sh	Wed Jul  8 16:19:32 2015	(r285275)
+++ user/pho/stress2/misc/datamove2.sh	Wed Jul  8 16:20:20 2015	(r285276)
@@ -44,7 +44,7 @@ rm -f datamove2.c
 
 for i in `jot 2`; do
 	$here/../testcases/swap/swap -t 10m -i 200 -h &
-	/tmp/datamove2
+	/tmp/datamove2 || { echo FAIL; exit 1; }
 	ps | grep swap | grep -v swap | awk '{print $1}' | xargs kill
 done
 rm -rf /tmp/datamove2
@@ -169,8 +169,16 @@ unmapBuffer(char *bufferp)
 {
 	if (munmap(bufferp, pagesize * 2) == -1)
 		err(1, "unmap 1. buffer");
+	/*
+	   The following unmaps something random, which could trigger:
+	   Program received signal SIGSEGV, Segmentation fault.
+	   free (cp=0x28070000) at /usr/src/libexec/rtld-elf/malloc.c:311
+	*/
+
+#if 0
 	if (munmap(bufferp + pagesize * 2, pagesize * 2) == -1)
 		err(1, "unmap 2. buffer");
+#endif
 }
 
 int