cd85adf1c0
* * * XXX: The internal memory tracking of ACPICA, available when ACPI_DBG_TRACK_ALLOCATIONS is defined, has been removed from ACPI_DEBUG. This is due to the instability of the ABI of ACPICA. If the memory tracking is enabled, ACPICA will insert a header to each memory allocation. As a consequence, when ACPI specific code is loaded as a kernel module and the running kernel has been compiled with ACPI_DEBUG, the result is an instant panic. This happens because of unaligned memory access when the code tries to use ACPI_FREE for a buffer obtained via ACPI_ALLOCATE, AcpiEvaluateObject(), and related calls. If the involved memory statistics are required, a separate constant ACPI_DEBUG_ALLOC is available in options(4) for ACPI_DEBUG kernels. * * * Discussed with, and ok'ed by, jmcneill@ and pooka@.