svn commit: r192209 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs

[Kip Macy]

Author: kmacy
Date: Sat May 16 20:09:07 2009
New Revision: 192209
URL: http://svn.freebsd.org/changeset/base/192209

Log:
  only use direct map if system has more than 2GB

Modified:
  head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c

Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c	Sat May 16 19:18:13 2009	(r192208)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c	Sat May 16 20:09:07 2009	(r192209)
@@ -3432,7 +3432,7 @@ arc_init(void)
 	/* Start out with 1/8 of all memory */
 #if defined(_KERNEL) && (__amd64__)
 	arc_c = physmem*PAGE_SIZE / 8;
-	if (physmem*PAGE_SIZE > kmem_size())
+	if (physmem*PAGE_SIZE > kmem_size() && (physmem > (1UL<<31)))
 		arc_large_memory_enabled = 1;
 #else
 	arc_c = kmem_size() / 8;