Add regression test for overlapping allocation that should coallesce but

currently doesn't.

2 files changed, 12 insertions, 2 deletions

diff --git a/regress/sys/kern/extent/extest.exp b/regress/sys/kern/extent/extest.exp
index 930ba80a494..6312307f2e9 100644
--- a/regress/sys/kern/extent/extest.exp
+++ b/regress/sys/kern/extent/extest.exp
@@ -1,4 +1,4 @@
-# $OpenBSD: extest.exp,v 1.2 2009/04/10 20:57:04 kettenis Exp $
+# $OpenBSD: extest.exp,v 1.3 2009/09/18 19:19:15 kettenis Exp $
 # $NetBSD: extest.exp,v 1.9 2005/03/15 18:27:23 bouyer Exp $
 # real output must start in line 5
 
@@ -86,3 +86,6 @@ extent `test14' (0x0 - 0xffffffff), flags = 0x0
 output for test15
 extent `test15' (0x0 - 0xffffffff), flags = 0x0
      0xf8000000 - 0xffffffff
+output for test16
+extent `test16' (0x0 - 0xffffffff), flags = 0x0
+     0x0 - 0x1fffffff
diff --git a/regress/sys/kern/extent/tests b/regress/sys/kern/extent/tests
index a5ac81d077a..fe312a5ae4d 100644
--- a/regress/sys/kern/extent/tests
+++ b/regress/sys/kern/extent/tests
@@ -1,4 +1,4 @@
-# $OpenBSD: tests,v 1.3 2009/04/10 20:57:04 kettenis Exp $
+# $OpenBSD: tests,v 1.4 2009/09/18 19:19:15 kettenis Exp $
 # $NetBSD: tests,v 1.9 2005/03/15 18:27:23 bouyer Exp $
 
 #fill up an extent, should coalesce into one allocation
@@ -123,3 +123,10 @@ alloc_region 0xfce00000 0x100
 alloc_region 0xfee00000 0x100
 alloc_region 0xf8000000 0x8000000 EX_CONFLICTOK
 print
+
+# Check coallescing in combination with overlaps
+extent test16 0x00000000 0xffffffff
+alloc_region 0x0 0xa0000
+alloc_region 0xf0000 0x1ff10000
+alloc_region 0xa0000 0x60000 EX_CONFLICTOK
+print