FRONTEND_STACK_ALLOC 19 include/linux/poll.h #define SELECT_STACK_ALLOC FRONTEND_STACK_ALLOC FRONTEND_STACK_ALLOC 20 include/linux/poll.h #define POLL_STACK_ALLOC FRONTEND_STACK_ALLOC FRONTEND_STACK_ALLOC 21 include/linux/poll.h #define WQUEUES_STACK_ALLOC (MAX_STACK_ALLOC - FRONTEND_STACK_ALLOC)