diff options
author | David Woodhouse <dwmw2@infradead.org> | 2006-08-30 18:30:38 -0400 |
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committer | David Woodhouse <dwmw2@infradead.org> | 2006-08-30 18:30:38 -0400 |
commit | 0a7d5f8ce960e74fa22986bda4af488539796e49 (patch) | |
tree | e29ad17808a5c3410518e22dae8dfe94801b59f3 /include/linux/delayacct.h | |
parent | 0165508c80a2b5d5268d9c5dfa9b30c534a33693 (diff) | |
parent | dc709bd190c130b299ac19d596594256265c042a (diff) |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'include/linux/delayacct.h')
-rw-r--r-- | include/linux/delayacct.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/include/linux/delayacct.h b/include/linux/delayacct.h new file mode 100644 index 000000000000..11487b6e7127 --- /dev/null +++ b/include/linux/delayacct.h | |||
@@ -0,0 +1,117 @@ | |||
1 | /* delayacct.h - per-task delay accounting | ||
2 | * | ||
3 | * Copyright (C) Shailabh Nagar, IBM Corp. 2006 | ||
4 | * | ||
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. | ||
9 | * | ||
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. | ||
14 | * | ||
15 | */ | ||
16 | |||
17 | #ifndef _LINUX_DELAYACCT_H | ||
18 | #define _LINUX_DELAYACCT_H | ||
19 | |||
20 | #include <linux/sched.h> | ||
21 | #include <linux/taskstats_kern.h> | ||
22 | |||
23 | /* | ||
24 | * Per-task flags relevant to delay accounting | ||
25 | * maintained privately to avoid exhausting similar flags in sched.h:PF_* | ||
26 | * Used to set current->delays->flags | ||
27 | */ | ||
28 | #define DELAYACCT_PF_SWAPIN 0x00000001 /* I am doing a swapin */ | ||
29 | |||
30 | #ifdef CONFIG_TASK_DELAY_ACCT | ||
31 | |||
32 | extern int delayacct_on; /* Delay accounting turned on/off */ | ||
33 | extern kmem_cache_t *delayacct_cache; | ||
34 | extern void delayacct_init(void); | ||
35 | extern void __delayacct_tsk_init(struct task_struct *); | ||
36 | extern void __delayacct_tsk_exit(struct task_struct *); | ||
37 | extern void __delayacct_blkio_start(void); | ||
38 | extern void __delayacct_blkio_end(void); | ||
39 | extern int __delayacct_add_tsk(struct taskstats *, struct task_struct *); | ||
40 | extern __u64 __delayacct_blkio_ticks(struct task_struct *); | ||
41 | |||
42 | static inline void delayacct_set_flag(int flag) | ||
43 | { | ||
44 | if (current->delays) | ||
45 | current->delays->flags |= flag; | ||
46 | } | ||
47 | |||
48 | static inline void delayacct_clear_flag(int flag) | ||
49 | { | ||
50 | if (current->delays) | ||
51 | current->delays->flags &= ~flag; | ||
52 | } | ||
53 | |||
54 | static inline void delayacct_tsk_init(struct task_struct *tsk) | ||
55 | { | ||
56 | /* reinitialize in case parent's non-null pointer was dup'ed*/ | ||
57 | tsk->delays = NULL; | ||
58 | if (delayacct_on) | ||
59 | __delayacct_tsk_init(tsk); | ||
60 | } | ||
61 | |||
62 | static inline void delayacct_tsk_exit(struct task_struct *tsk) | ||
63 | { | ||
64 | if (tsk->delays) | ||
65 | __delayacct_tsk_exit(tsk); | ||
66 | } | ||
67 | |||
68 | static inline void delayacct_blkio_start(void) | ||
69 | { | ||
70 | if (current->delays) | ||
71 | __delayacct_blkio_start(); | ||
72 | } | ||
73 | |||
74 | static inline void delayacct_blkio_end(void) | ||
75 | { | ||
76 | if (current->delays) | ||
77 | __delayacct_blkio_end(); | ||
78 | } | ||
79 | |||
80 | static inline int delayacct_add_tsk(struct taskstats *d, | ||
81 | struct task_struct *tsk) | ||
82 | { | ||
83 | if (!delayacct_on || !tsk->delays) | ||
84 | return 0; | ||
85 | return __delayacct_add_tsk(d, tsk); | ||
86 | } | ||
87 | |||
88 | static inline __u64 delayacct_blkio_ticks(struct task_struct *tsk) | ||
89 | { | ||
90 | if (tsk->delays) | ||
91 | return __delayacct_blkio_ticks(tsk); | ||
92 | return 0; | ||
93 | } | ||
94 | |||
95 | #else | ||
96 | static inline void delayacct_set_flag(int flag) | ||
97 | {} | ||
98 | static inline void delayacct_clear_flag(int flag) | ||
99 | {} | ||
100 | static inline void delayacct_init(void) | ||
101 | {} | ||
102 | static inline void delayacct_tsk_init(struct task_struct *tsk) | ||
103 | {} | ||
104 | static inline void delayacct_tsk_exit(struct task_struct *tsk) | ||
105 | {} | ||
106 | static inline void delayacct_blkio_start(void) | ||
107 | {} | ||
108 | static inline void delayacct_blkio_end(void) | ||
109 | {} | ||
110 | static inline int delayacct_add_tsk(struct taskstats *d, | ||
111 | struct task_struct *tsk) | ||
112 | { return 0; } | ||
113 | static inline __u64 delayacct_blkio_ticks(struct task_struct *tsk) | ||
114 | { return 0; } | ||
115 | #endif /* CONFIG_TASK_DELAY_ACCT */ | ||
116 | |||
117 | #endif | ||