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authorAlexey Starikovskiy <astarikovskiy@suse.de>2010-05-26 13:59:51 +0800
committerLen Brown <len.brown@intel.com>2010-07-06 22:33:57 -0400
commita9fc03125ea0001ff18bc29da9539b587fdbd1d7 (patch)
tree721b794d27aa84780c8e8f0e01d2119713b01ca7 /drivers/acpi/acpica
parent20d33aea7ae7ad858f3f91c834d9043cd8122d38 (diff)
downloadblackbird-op-linux-a9fc03125ea0001ff18bc29da9539b587fdbd1d7.tar.gz
blackbird-op-linux-a9fc03125ea0001ff18bc29da9539b587fdbd1d7.zip
ACPICA: Optimization: Reduce the number of namespace walks
On control method exit, only walk the namespace if the method is known to have created namespace objects outside of its local scope. Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/acpica')
-rw-r--r--drivers/acpi/acpica/dsmethod.c18
-rw-r--r--drivers/acpi/acpica/nsalloc.c20
2 files changed, 32 insertions, 6 deletions
diff --git a/drivers/acpi/acpica/dsmethod.c b/drivers/acpi/acpica/dsmethod.c
index 00846333773e..64750ee96e20 100644
--- a/drivers/acpi/acpica/dsmethod.c
+++ b/drivers/acpi/acpica/dsmethod.c
@@ -584,8 +584,22 @@ acpi_ds_terminate_control_method(union acpi_operand_object *method_desc,
* want make the objects permanent.
*/
if (!(method_desc->method.flags & AOPOBJ_MODULE_LEVEL)) {
- acpi_ns_delete_namespace_by_owner(method_desc->method.
- owner_id);
+
+ /* Delete any direct children of (created by) this method */
+
+ acpi_ns_delete_namespace_subtree(walk_state->
+ method_node);
+
+ /*
+ * Delete any objects that were created by this method
+ * elsewhere in the namespace (if any were created).
+ */
+ if (method_desc->method.
+ flags & AOPOBJ_MODIFIED_NAMESPACE) {
+ acpi_ns_delete_namespace_by_owner(method_desc->
+ method.
+ owner_id);
+ }
}
}
diff --git a/drivers/acpi/acpica/nsalloc.c b/drivers/acpi/acpica/nsalloc.c
index 8d3a43a061ab..1e5ff803d9ad 100644
--- a/drivers/acpi/acpica/nsalloc.c
+++ b/drivers/acpi/acpica/nsalloc.c
@@ -219,12 +219,24 @@ void acpi_ns_install_node(struct acpi_walk_state *walk_state, struct acpi_namesp
ACPI_FUNCTION_TRACE(ns_install_node);
- /*
- * Get the owner ID from the Walk state. The owner ID is used to track
- * table deletion and deletion of objects created by methods.
- */
if (walk_state) {
+ /*
+ * Get the owner ID from the Walk state. The owner ID is used to
+ * track table deletion and deletion of objects created by methods.
+ */
owner_id = walk_state->owner_id;
+
+ if ((walk_state->method_desc) &&
+ (parent_node != walk_state->method_node)) {
+ /*
+ * A method is creating a new node that is not a child of the
+ * method (it is non-local). Mark the executing method as having
+ * modified the namespace. This is used for cleanup when the
+ * method exits.
+ */
+ walk_state->method_desc->method.flags |=
+ AOPOBJ_MODIFIED_NAMESPACE;
+ }
}
/* Link the new entry into the parent and existing children */
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