2009-11-20 02:10:51 +08:00
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/* Slow work private definitions
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*
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* Copyright (C) 2009 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#define SLOW_WORK_CULL_TIMEOUT (5 * HZ) /* cull threads 5s after running out of
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* things to do */
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#define SLOW_WORK_OOM_TIMEOUT (5 * HZ) /* can't start new threads for 5s after
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* OOM */
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#define SLOW_WORK_THREAD_LIMIT 255 /* abs maximum number of slow-work threads */
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/*
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* slow-work.c
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*/
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2009-12-01 23:36:11 +08:00
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#ifdef CONFIG_SLOW_WORK_DEBUG
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2009-11-20 02:10:51 +08:00
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extern struct slow_work *slow_work_execs[];
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extern pid_t slow_work_pids[];
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extern rwlock_t slow_work_execs_lock;
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#endif
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extern struct list_head slow_work_queue;
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extern struct list_head vslow_work_queue;
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extern spinlock_t slow_work_queue_lock;
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/*
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2009-12-01 23:36:11 +08:00
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* slow-work-debugfs.c
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2009-11-20 02:10:51 +08:00
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*/
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2009-12-01 23:36:11 +08:00
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#ifdef CONFIG_SLOW_WORK_DEBUG
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2009-11-20 02:10:51 +08:00
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extern const struct file_operations slow_work_runqueue_fops;
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extern void slow_work_new_thread_desc(struct slow_work *, struct seq_file *);
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#endif
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/*
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* Helper functions
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*/
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static inline void slow_work_set_thread_pid(int id, pid_t pid)
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{
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#ifdef CONFIG_SLOW_WORK_PROC
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slow_work_pids[id] = pid;
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#endif
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}
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static inline void slow_work_mark_time(struct slow_work *work)
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{
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#ifdef CONFIG_SLOW_WORK_PROC
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work->mark = CURRENT_TIME;
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#endif
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}
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static inline void slow_work_begin_exec(int id, struct slow_work *work)
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{
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#ifdef CONFIG_SLOW_WORK_PROC
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slow_work_execs[id] = work;
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#endif
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}
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static inline void slow_work_end_exec(int id, struct slow_work *work)
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{
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#ifdef CONFIG_SLOW_WORK_PROC
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write_lock(&slow_work_execs_lock);
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slow_work_execs[id] = NULL;
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write_unlock(&slow_work_execs_lock);
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#endif
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}
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