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| author | Alexey Starikovskiy <astarikovskiy@suse.de> | 2010-05-26 07:53:07 +0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2010-07-07 06:33:56 +0400 |
| commit | c45b5c097001480e66d4c523eb715ad317a4ef77 (patch) | |
| tree | 5b9415840b97a724537273db99b2c66975c63347 /drivers/acpi/acpica/nsnames.c | |
| parent | 5821f75421aa7c7bafdec291223153597f649934 (diff) | |
| download | linux-c45b5c097001480e66d4c523eb715ad317a4ef77.tar.xz | |
ACPICA: Performance enhancement for namespace search and access
This change enhances the performance of namespace searches and
walks by adding a backpointer to the parent in each namespace
node. On large namespaces, this change can improve overall ACPI
performance by up to 9X. Adding a pointer to each namespace node
increases the overall size of the internal namespace by about 5%,
since each namespace entry usually consists of both a namespace
node and an ACPI operand object.
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/nsnames.c')
| -rw-r--r-- | drivers/acpi/acpica/nsnames.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/acpi/acpica/nsnames.c b/drivers/acpi/acpica/nsnames.c index 7dea0031605c..d3104af57e13 100644 --- a/drivers/acpi/acpica/nsnames.c +++ b/drivers/acpi/acpica/nsnames.c @@ -93,7 +93,7 @@ acpi_ns_build_external_path(struct acpi_namespace_node *node, /* Put the name into the buffer */ ACPI_MOVE_32_TO_32((name_buffer + index), &parent_node->name); - parent_node = acpi_ns_get_parent_node(parent_node); + parent_node = parent_node->parent; /* Prefix name with the path separator */ @@ -198,7 +198,7 @@ acpi_size acpi_ns_get_pathname_length(struct acpi_namespace_node *node) return 0; } size += ACPI_PATH_SEGMENT_LENGTH; - next_node = acpi_ns_get_parent_node(next_node); + next_node = next_node->parent; } if (!size) { |