1 /* delayacct.h - per-task delay accounting
3 * Copyright (C) Shailabh Nagar, IBM Corp. 2006
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
17 #ifndef _LINUX_TASKDELAYS_H
18 #define _LINUX_TASKDELAYS_H
20 #include <linux/sched.h>
21 #include <linux/taskstats.h>
23 #ifdef CONFIG_TASK_DELAY_ACCT
24 extern int delayacct_on; /* Delay accounting turned on/off */
25 extern kmem_cache_t *delayacct_cache;
26 extern void delayacct_init(void);
27 extern void __delayacct_tsk_init(struct task_struct *);
28 extern void __delayacct_tsk_exit(struct task_struct *);
29 extern void __delayacct_blkio_start(void);
30 extern void __delayacct_blkio_end(void);
31 extern int __delayacct_add_tsk(struct taskstats *, struct task_struct *);
33 static inline void delayacct_tsk_init(struct task_struct *tsk)
35 /* reinitialize in case parent's non-null pointer was dup'ed*/
37 if (unlikely(delayacct_on))
38 __delayacct_tsk_init(tsk);
41 static inline void delayacct_tsk_exit(struct task_struct *tsk)
44 __delayacct_tsk_exit(tsk);
47 static inline void delayacct_blkio_start(void)
49 if (unlikely(current->delays))
50 __delayacct_blkio_start();
52 static inline void delayacct_blkio_end(void)
54 if (unlikely(current->delays))
55 __delayacct_blkio_end();
58 static inline void delayacct_init(void)
60 static inline void delayacct_tsk_init(struct task_struct *tsk)
62 static inline void delayacct_tsk_exit(struct task_struct *tsk)
64 static inline void delayacct_blkio_start(void)
66 static inline void delayacct_blkio_end(void)
68 #endif /* CONFIG_TASK_DELAY_ACCT */
69 #ifdef CONFIG_TASKSTATS
70 static inline int delayacct_add_tsk(struct taskstats *d,
71 struct task_struct *tsk)
73 if (likely(!delayacct_on))
77 return __delayacct_add_tsk(d, tsk);
80 #endif /* _LINUX_TASKDELAYS_H */