projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 8fba10a4 DH |
1 | /* Slow work private definitions |
| 2 | * | |
| 3 | * Copyright (C) 2009 Red Hat, Inc. All Rights Reserved. | |
| 4 | * Written by David Howells ([email protected]) | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU General Public Licence | |
| 8 | * as published by the Free Software Foundation; either version | |
| 9 | * 2 of the Licence, or (at your option) any later version. | |
| 10 | */ | |
| 11 | ||
| 12 | #define SLOW_WORK_CULL_TIMEOUT (5 * HZ) /* cull threads 5s after running out of | |
| 13 | * things to do */ | |
| 14 | #define SLOW_WORK_OOM_TIMEOUT (5 * HZ) /* can't start new threads for 5s after | |
| 15 | * OOM */ | |
| 16 | ||
| 17 | #define SLOW_WORK_THREAD_LIMIT 255 /* abs maximum number of slow-work threads */ | |
| 18 | ||
| 19 | /* | |
| 20 | * slow-work.c | |
| 21 | */ | |
| f13a48bd | 22 | #ifdef CONFIG_SLOW_WORK_DEBUG |
| 8fba10a4 DH |
23 | extern struct slow_work *slow_work_execs[]; |
| 24 | extern pid_t slow_work_pids[]; | |
| 25 | extern rwlock_t slow_work_execs_lock; | |
| 26 | #endif | |
| 27 | ||
| 28 | extern struct list_head slow_work_queue; | |
| 29 | extern struct list_head vslow_work_queue; | |
| 30 | extern spinlock_t slow_work_queue_lock; | |
| 31 | ||
| 32 | /* | |
| f13a48bd | 33 | * slow-work-debugfs.c |
| 8fba10a4 | 34 | */ |
| f13a48bd | 35 | #ifdef CONFIG_SLOW_WORK_DEBUG |
| 8fba10a4 DH |
36 | extern const struct file_operations slow_work_runqueue_fops; |
| 37 | ||
| 38 | extern void slow_work_new_thread_desc(struct slow_work *, struct seq_file *); | |
| 39 | #endif | |
| 40 | ||
| 41 | /* | |
| 42 | * Helper functions | |
| 43 | */ | |
| 44 | static inline void slow_work_set_thread_pid(int id, pid_t pid) | |
| 45 | { | |
| 46 | #ifdef CONFIG_SLOW_WORK_PROC | |
| 47 | slow_work_pids[id] = pid; | |
| 48 | #endif | |
| 49 | } | |
| 50 | ||
| 51 | static inline void slow_work_mark_time(struct slow_work *work) | |
| 52 | { | |
| 53 | #ifdef CONFIG_SLOW_WORK_PROC | |
| 54 | work->mark = CURRENT_TIME; | |
| 55 | #endif | |
| 56 | } | |
| 57 | ||
| 58 | static inline void slow_work_begin_exec(int id, struct slow_work *work) | |
| 59 | { | |
| 60 | #ifdef CONFIG_SLOW_WORK_PROC | |
| 61 | slow_work_execs[id] = work; | |
| 62 | #endif | |
| 63 | } | |
| 64 | ||
| 65 | static inline void slow_work_end_exec(int id, struct slow_work *work) | |
| 66 | { | |
| 67 | #ifdef CONFIG_SLOW_WORK_PROC | |
| 68 | write_lock(&slow_work_execs_lock); | |
| 69 | slow_work_execs[id] = NULL; | |
| 70 | write_unlock(&slow_work_execs_lock); | |
| 71 | #endif | |
| 72 | } |