From eadf2bdaecb0bf137e81c62dcade0a0bfbc08188 Mon Sep 17 00:00:00 2001
From: fjoe <fjoe@FreeBSD.org>
Date: Sun, 28 Nov 2010 19:26:20 +0000
Subject: [PATCH] Define VM_KMEM_SIZE_MAX on sparc64. Otherwise kernel built
 with DEBUG_MEMGUARD panics early in kmeminit() with the message
 "kmem_suballoc: bad status return of 1" because of zero "size" argument
 passed to kmem_suballoc() due to "vm_kmem_size_max" being zero.

The problem also exists on ia64.
---
 sys/sparc64/include/vmparam.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/sys/sparc64/include/vmparam.h b/sys/sparc64/include/vmparam.h
index b92312efc0b2..26caab3cadad 100644
--- a/sys/sparc64/include/vmparam.h
+++ b/sys/sparc64/include/vmparam.h
@@ -236,6 +236,14 @@
 #define	VM_KMEM_SIZE_SCALE	(3)
 #endif
 
+/*
+ * Ceiling on amount of kmem_map kva space.
+ */
+#ifndef VM_KMEM_SIZE_MAX
+#define	VM_KMEM_SIZE_MAX	((VM_MAX_KERNEL_ADDRESS - \
+    VM_MIN_KERNEL_ADDRESS + 1) * 3 / 5)
+#endif
+
 /*
  * Initial pagein size of beginning of executable file.
  */