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ACPICA: Re-implement interpreters' "serialized mode"

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Enhanced the implementation of the interpreters'
serialized mode (boot with "acpi_serialize" to set
acpi_glb_all_methods_serialized flag.)
When this mode is specified, instead of creating a serialization
semaphore per control method, the interpreter lock is
simply no longer released before a blocking operation
during control method execution. This effectively makes
the AML Interpreter single-threaded. The overhead of a
semaphore per-method is eliminated.

Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bob Moore
2007-02-02 19:48:20 +03:00
committed by Len Brown
parent 95befdb398
commit 1ba753acb3
9 changed files with 114 additions and 85 deletions
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11
drivers/acpi/namespace/nsxfeval.c
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@@ -170,7 +170,6 @@ acpi_evaluate_object(acpi_handle handle,
struct acpi_buffer *return_buffer)
{
acpi_status status;
acpi_status status2;
struct acpi_evaluate_info *info;
acpi_size buffer_space_needed;
u32 i;
@@ -329,14 +328,12 @@ acpi_evaluate_object(acpi_handle handle,
* Delete the internal return object. NOTE: Interpreter must be
* locked to avoid race condition.
*/
status2 = acpi_ex_enter_interpreter();
if (ACPI_SUCCESS(status2)) {
acpi_ex_enter_interpreter();
/* Remove one reference on the return object (should delete it) */
/* Remove one reference on the return object (should delete it) */
acpi_ut_remove_reference(info->return_object);
acpi_ex_exit_interpreter();
}
acpi_ut_remove_reference(info->return_object);
acpi_ex_exit_interpreter();
}
cleanup: