var_pc_compound
var_pc_vmstat
var_pc_order_field
var_pc_basic_alloc
var_pc_size_functions
var_pc_guards
var_pc_flush_zero
var_pc_libfs
var_pc_filemap
var_pc_readahead
var_pc_reclaim
var_pc_writeback
var_pc_buffer_head
var_pc_ramfs
var_pc_ext2
var_pc_alternate