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;
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