Author: avg
Date: Thu Oct 7 18:16:14 2010
New Revision: 213528
URL: http://svn.freebsd.org/changeset/base/213528
Log:
opensolaris_kmem kmem_size(): report lesser of vm_kmem_size and available
physical memory
This is needed to correctly autotune ZFS ARC size when vm_kmem_size is
set to value larger than available physical memory.
MFC after: 2 weeks
Modified:
head/sys/cddl/compat/opensolaris/kern/opensolaris_kmem.c
Modified: head/sys/cddl/compat/opensolaris/kern/opensolaris_kmem.c
==============================================================================
--- head/sys/cddl/compat/opensolaris/kern/opensolaris_kmem.c Thu Oct 7
18:11:33 2010 (r213527)
+++ head/sys/cddl/compat/opensolaris/kern/opensolaris_kmem.c Thu Oct 7
18:16:14 2010 (r213528)
@@ -112,18 +112,30 @@ zfs_kmem_free(void *buf, size_t size __u
free(buf, M_SOLARIS);
}
+static uint64_t kmem_size_val;
+
+static void
+kmem_size_init(void *unused __unused)
+{
+
+ kmem_size_val = (uint64_t)cnt.v_page_count * PAGE_SIZE;
+ if (kmem_size_val > vm_kmem_size)
+ kmem_size_val = vm_kmem_size;
+}
+SYSINIT(kmem_size_init, SI_SUB_KMEM, SI_ORDER_ANY, kmem_size_init, NULL);
+
uint64_t
kmem_size(void)
{
- return ((uint64_t)vm_kmem_size);
+ return (kmem_size_val);
}
uint64_t
kmem_used(void)
{
- return ((uint64_t)kmem_map->size);
+ return (kmem_map->size);
}
static int
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