进程与调度之数据结构-files_struct

/*
 * Open file table structure
 */
struct files_struct {
  /*
   * read mostly part
   */
    atomic_t count;
    struct fdtable *fdt;
    struct fdtable fdtab;
  /*
   * written part on a separate cache line in SMP
   */
    spinlock_t file_lock ____cacheline_aligned_in_smp;
    int next_fd;
    struct embedded_fd_set close_on_exec_init;
    struct embedded_fd_set open_fds_init;
    struct file * fd_array[NR_OPEN_DEFAULT];
};