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_DELAYACCT_H
18 #define _LINUX_DELAYACCT_H
20 #include <linux/sched.h>
23 * Per-task flags relevant to delay accounting
24 * maintained privately to avoid exhausting similar flags in sched.h:PF_*
25 * Used to set current->delays->flags
27 #define DELAYACCT_PF_SWAPIN 0x00000001 /* I am doing a swapin */
29 #ifdef CONFIG_TASK_DELAY_ACCT
31 extern int delayacct_on; /* Delay accounting turned on/off */
32 extern kmem_cache_t *delayacct_cache;
33 extern void delayacct_init(void);
34 extern void __delayacct_tsk_init(struct task_struct *);
35 extern void __delayacct_tsk_exit(struct task_struct *);
36 extern void __delayacct_blkio_start(void);
37 extern void __delayacct_blkio_end(void);
39 static inline void delayacct_set_flag(int flag)
42 current->delays->flags |= flag;
45 static inline void delayacct_clear_flag(int flag)
48 current->delays->flags &= ~flag;
51 static inline void delayacct_tsk_init(struct task_struct *tsk)
53 /* reinitialize in case parent's non-null pointer was dup'ed*/
55 if (unlikely(delayacct_on))
56 __delayacct_tsk_init(tsk);
59 static inline void delayacct_tsk_exit(struct task_struct *tsk)
62 __delayacct_tsk_exit(tsk);
65 static inline void delayacct_blkio_start(void)
68 __delayacct_blkio_start();
71 static inline void delayacct_blkio_end(void)
74 __delayacct_blkio_end();
78 static inline void delayacct_set_flag(int flag)
80 static inline void delayacct_clear_flag(int flag)
82 static inline void delayacct_init(void)
84 static inline void delayacct_tsk_init(struct task_struct *tsk)
86 static inline void delayacct_tsk_exit(struct task_struct *tsk)
88 static inline void delayacct_blkio_start(void)
90 static inline void delayacct_blkio_end(void)
92 #endif /* CONFIG_TASK_DELAY_ACCT */