[PATCH] per-task-delay-accounting: setup
[linux-2.6.git] / include / linux / sched.h
index 1c876e2..7a54e62 100644 (file)
@@ -552,6 +552,23 @@ struct sched_info {
 extern struct file_operations proc_schedstat_operations;
 #endif
 
+#ifdef CONFIG_TASK_DELAY_ACCT
+struct task_delay_info {
+       spinlock_t      lock;
+       unsigned int    flags;  /* Private per-task flags */
+
+       /* For each stat XXX, add following, aligned appropriately
+        *
+        * struct timespec XXX_start, XXX_end;
+        * u64 XXX_delay;
+        * u32 XXX_count;
+        *
+        * Atomicity of updates to XXX_delay, XXX_count protected by
+        * single lock above (split into XXX_lock if contention is an issue).
+        */
+};
+#endif
+
 enum idle_type
 {
        SCHED_IDLE,
@@ -945,6 +962,9 @@ struct task_struct {
         * cache last used pipe for splice
         */
        struct pipe_inode_info *splice_pipe;
+#ifdef CONFIG_TASK_DELAY_ACCT
+       struct task_delay_info *delays;
+#endif
 };
 
 static inline pid_t process_group(struct task_struct *tsk)