[ACPI] ACPICA 20060317
Implemented the use of a cache object for all internal
namespace nodes. Since there are about 1000 static nodes
in a typical system, this will decrease memory use for
cache implementations that minimize per-allocation overhead
(such as a slab allocator.)
Removed the reference count mechanism for internal
namespace nodes, since it was deemed unnecessary. This
reduces the size of each namespace node by about 5%-10%
on all platforms. Nodes are now 20 bytes for the 32-bit
case, and 32 bytes for the 64-bit case.
Optimized several internal data structures to reduce
object size on 64-bit platforms by packing data within
the 64-bit alignment. This includes the frequently used
ACPI_OPERAND_OBJECT, of which there can be ~1000 static
instances corresponding to the namespace objects.
Added two new strings for the predefined _OSI method:
"Windows 2001.1 SP1" and "Windows 2006".
Split the allocation tracking mechanism out to a separate
file, from utalloc.c to uttrack.c. This mechanism appears
to be only useful for application-level code. Kernels may
wish to not include uttrack.c in distributions.
Removed all remnants of the obsolete ACPI_REPORT_* macros
and the associated code. (These macros have been replaced
by the ACPI_ERROR and ACPI_WARNING macros.)
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/namespace/nsalloc.c b/drivers/acpi/namespace/nsalloc.c
index acd4b67..8b921c9 100644
--- a/drivers/acpi/namespace/nsalloc.c
+++ b/drivers/acpi/namespace/nsalloc.c
@@ -47,9 +47,6 @@
#define _COMPONENT ACPI_NAMESPACE
ACPI_MODULE_NAME("nsalloc")
-/* Local prototypes */
-static void acpi_ns_remove_reference(struct acpi_namespace_node *node);
-
/*******************************************************************************
*
* FUNCTION: acpi_ns_create_node
@@ -61,14 +58,13 @@
* DESCRIPTION: Create a namespace node
*
******************************************************************************/
-
struct acpi_namespace_node *acpi_ns_create_node(u32 name)
{
struct acpi_namespace_node *node;
ACPI_FUNCTION_TRACE("ns_create_node");
- node = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_namespace_node));
+ node = acpi_os_acquire_object(acpi_gbl_namespace_cache);
if (!node) {
return_PTR(NULL);
}
@@ -76,9 +72,7 @@
ACPI_MEM_TRACKING(acpi_gbl_ns_node_list->total_allocated++);
node->name.integer = name;
- node->reference_count = 1;
ACPI_SET_DESCRIPTOR_TYPE(node, ACPI_DESC_TYPE_NAMED);
-
return_PTR(node);
}
@@ -139,10 +133,10 @@
ACPI_MEM_TRACKING(acpi_gbl_ns_node_list->total_freed++);
/*
- * Detach an object if there is one then delete the node
+ * Detach an object if there is one, then delete the node
*/
acpi_ns_detach_object(node);
- ACPI_FREE(node);
+ (void)acpi_os_release_object(acpi_gbl_namespace_cache, node);
return_VOID;
}
@@ -217,16 +211,6 @@
acpi_ut_get_node_name(parent_node),
acpi_ut_get_type_name(parent_node->type),
parent_node));
-
- /*
- * Increment the reference count(s) of all parents up to
- * the root!
- */
- while ((node = acpi_ns_get_parent_node(node)) != NULL) {
- node->reference_count++;
- }
-
- return_VOID;
}
/*******************************************************************************
@@ -246,7 +230,6 @@
{
struct acpi_namespace_node *child_node;
struct acpi_namespace_node *next_node;
- struct acpi_namespace_node *node;
u8 flags;
ACPI_FUNCTION_TRACE_PTR("ns_delete_children", parent_node);
@@ -292,26 +275,10 @@
*/
acpi_ns_detach_object(child_node);
- /*
- * Decrement the reference count(s) of all parents up to
- * the root! (counts were incremented when the node was created)
- */
- node = child_node;
- while ((node = acpi_ns_get_parent_node(node)) != NULL) {
- node->reference_count--;
- }
-
- /* There should be only one reference remaining on this node */
-
- if (child_node->reference_count != 1) {
- ACPI_WARNING((AE_INFO,
- "Existing references (%d) on node being deleted (%p)",
- child_node->reference_count, child_node));
- }
-
/* Now we can delete the node */
- ACPI_FREE(child_node);
+ (void)acpi_os_release_object(acpi_gbl_namespace_cache,
+ child_node);
/* And move on to the next child in the list */
@@ -358,8 +325,9 @@
/* Get the next node in this scope (NULL if none) */
- child_node = acpi_ns_get_next_node(ACPI_TYPE_ANY, parent_node,
- child_node);
+ child_node =
+ acpi_ns_get_next_node(ACPI_TYPE_ANY, parent_node,
+ child_node);
if (child_node) {
/* Found a child node - detach any attached object */
@@ -406,57 +374,6 @@
/*******************************************************************************
*
- * FUNCTION: acpi_ns_remove_reference
- *
- * PARAMETERS: Node - Named node whose reference count is to be
- * decremented
- *
- * RETURN: None.
- *
- * DESCRIPTION: Remove a Node reference. Decrements the reference count
- * of all parent Nodes up to the root. Any node along
- * the way that reaches zero references is freed.
- *
- ******************************************************************************/
-
-static void acpi_ns_remove_reference(struct acpi_namespace_node *node)
-{
- struct acpi_namespace_node *parent_node;
- struct acpi_namespace_node *this_node;
-
- ACPI_FUNCTION_ENTRY();
-
- /*
- * Decrement the reference count(s) of this node and all
- * nodes up to the root, Delete anything with zero remaining references.
- */
- this_node = node;
- while (this_node) {
-
- /* Prepare to move up to parent */
-
- parent_node = acpi_ns_get_parent_node(this_node);
-
- /* Decrement the reference count on this node */
-
- this_node->reference_count--;
-
- /* Delete the node if no more references */
-
- if (!this_node->reference_count) {
-
- /* Delete all children and delete the node */
-
- acpi_ns_delete_children(this_node);
- acpi_ns_delete_node(this_node);
- }
-
- this_node = parent_node;
- }
-}
-
-/*******************************************************************************
- *
* FUNCTION: acpi_ns_delete_namespace_by_owner
*
* PARAMETERS: owner_id - All nodes with this owner will be deleted
@@ -482,9 +399,9 @@
return_VOID;
}
+ deletion_node = NULL;
parent_node = acpi_gbl_root_node;
child_node = NULL;
- deletion_node = NULL;
level = 1;
/*
@@ -501,7 +418,8 @@
child_node);
if (deletion_node) {
- acpi_ns_remove_reference(deletion_node);
+ acpi_ns_delete_children(deletion_node);
+ acpi_ns_delete_node(deletion_node);
deletion_node = NULL;
}
