ACPI slab stats

FYI, ACPI slab usage on Viro's box.

1344 * 96 bytes = 129KB, which is significant.

[02:40] <viro> acpi_operand: ffffffff801d90af <acpi_os_acquire_object+b/3e> 1344 [02:40] <viro> size-2048: ffffffff802180fc <acpi_thermal_add+6b/223> 1 [02:40] <viro> size-1024: ffffffff80213331 <acpi_processor_add+65/10a> 1 [02:41] <viro> size-1024: ffffffff8021a01e <acpi_add_single_object+7b/22e> 56 [02:41] <viro> size-512: ffffffff801ff0f8 <acpi_ut_callocate+57/d3> 4 [02:41] <viro> size-192: ffffffff801ff0f8 <acpi_ut_callocate+57/d3> 5 [02:41] <viro> size-32: ffffffff801d8a0c <acpi_os_create_lock+31/c9> 1 [02:41] <viro> size-32: ffffffff801d96ad <acpi_evaluate_integer+8e/2b0> 6 [02:41] <viro> size-32: ffffffff80208071 <acpi_button_add+6b/3a3> 2 [02:41] <viro> size-32: ffffffff8020a85a <acpi_fan_add+74/18f> 1 [02:41] <viro> size-32: ffffffff80210968 <acpi_pci_bind+f1/480> 4 [02:42] <viro> size-32: ffffffff80211008 <acpi_pci_bind_root+f6/246> 1 [02:42] <viro> size-128: ffffffff801ff0f8 <acpi_ut_callocate+57/d3> 801 [02:42] <viro> size-64: ffffffff801d8b4d <acpi_os_create_semaphore+32/124> 15 [02:42] <viro> size-64: ffffffff801ff0f8 <acpi_ut_callocate+57/d3> 13 [02:42] <viro> size-64: ffffffff801ff18a <acpi_ut_create_list+16/40> 2 [02:42] <viro> size-64: ffffffff8020dcf7 <acpi_pci_root_add+80/429> 1 [02:42] <viro> size-64: ffffffff8020f2ae <acpi_pci_link_add+72/26d> 12 [02:43] <viro> size-64: ffffffff8020f8c0 <acpi_pci_irq_add_entry+75/1ae> 40 [02:43] <viro> size-64: ffffffff8021a0f3 <acpi_add_single_object+150/22e> 1