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SLOW_WORK: Move slow_work's proc file to debugfs

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Move slow_work's debugging proc file to debugfs.

Signed-off-by: David Howells <dhowells@redhat.com>
Requested-and-acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells 2009-12-01 15:36:11 +00:00 committed by Linus Torvalds
parent df87f8c06c
commit f13a48bd79
7 changed files with 28 additions and 22 deletions
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4
Documentation/slow-work.txt
View file

@ -279,9 +279,9 @@ The slow-work thread pool has a number of configurables:
VIEWING EXECUTING AND QUEUED ITEMS
==================================
If CONFIG_SLOW_WORK_PROC is enabled, a proc file is made available:
If CONFIG_SLOW_WORK_DEBUG is enabled, a debugfs file is made available:
/proc/slow_work_rq
/sys/kernel/debug/slow_work/runqueue
through which the list of work items being executed and the queues of items to
be executed may be viewed. The owner of a work item is given the chance to

8
include/linux/slow-work.h
View file

@ -20,7 +20,7 @@
#include <linux/timer.h>
struct slow_work;
#ifdef CONFIG_SLOW_WORK_PROC
#ifdef CONFIG_SLOW_WORK_DEBUG
struct seq_file;
#endif
@ -42,8 +42,8 @@ struct slow_work_ops {
/* execute a work item */
void (*execute)(struct slow_work *work);
#ifdef CONFIG_SLOW_WORK_PROC
/* describe a work item for /proc */
#ifdef CONFIG_SLOW_WORK_DEBUG
/* describe a work item for debugfs */
void (*desc)(struct slow_work *work, struct seq_file *m);
#endif
};
@ -64,7 +64,7 @@ struct slow_work {
#define SLOW_WORK_DELAYED 5 /* item is struct delayed_slow_work with active timer */
const struct slow_work_ops *ops; /* operations table for this item */
struct list_head link; /* link in queue */
#ifdef CONFIG_SLOW_WORK_PROC
#ifdef CONFIG_SLOW_WORK_DEBUG
struct timespec mark; /* jiffies at which queued or exec begun */
#endif
};

8
init/Kconfig
View file

@ -1098,12 +1098,12 @@ config SLOW_WORK
See Documentation/slow-work.txt.
config SLOW_WORK_PROC
bool "Slow work debugging through /proc"
config SLOW_WORK_DEBUG
bool "Slow work debugging through debugfs"
default n
depends on SLOW_WORK && PROC_FS
depends on SLOW_WORK && DEBUG_FS
help
Display the contents of the slow work run queue through /proc,
Display the contents of the slow work run queue through debugfs,
including items currently executing.
See Documentation/slow-work.txt.

2
kernel/Makefile
View file

@ -94,7 +94,7 @@ obj-$(CONFIG_X86_DS) += trace/
obj-$(CONFIG_RING_BUFFER) += trace/
obj-$(CONFIG_SMP) += sched_cpupri.o
obj-$(CONFIG_SLOW_WORK) += slow-work.o
obj-$(CONFIG_SLOW_WORK_PROC) += slow-work-proc.o
obj-$(CONFIG_SLOW_WORK_DEBUG) += slow-work-debugfs.o
obj-$(CONFIG_PERF_EVENTS) += perf_event.o
ifneq ($(CONFIG_SCHED_OMIT_FRAME_POINTER),y)

4
kernel/slow-work-proc.c → kernel/slow-work-debugfs.c
View file

@ -57,7 +57,7 @@ static void slow_work_print_mark(struct seq_file *m, struct slow_work *work)
}
/*
* Describe a slow work item for /proc
* Describe a slow work item for debugfs
*/
static int slow_work_runqueue_show(struct seq_file *m, void *v)
{
@ -211,7 +211,7 @@ static const struct seq_operations slow_work_runqueue_ops = {
};
/*
* open "/proc/slow_work_rq" to list queue contents
* open "/sys/kernel/debug/slow_work/runqueue" to list queue contents
*/
static int slow_work_runqueue_open(struct inode *inode, struct file *file)
{

18
kernel/slow-work.c
View file

@ -16,7 +16,7 @@
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/wait.h>
#include <linux/proc_fs.h>
#include <linux/debugfs.h>
#include "slow-work.h"
static void slow_work_cull_timeout(unsigned long);
@ -138,7 +138,7 @@ static void slow_work_clear_thread_processing(int id) {}
/*
* Data for tracking currently executing items for indication through /proc
*/
#ifdef CONFIG_SLOW_WORK_PROC
#ifdef CONFIG_SLOW_WORK_DEBUG
struct slow_work *slow_work_execs[SLOW_WORK_THREAD_LIMIT];
pid_t slow_work_pids[SLOW_WORK_THREAD_LIMIT];
DEFINE_RWLOCK(slow_work_execs_lock);
@ -823,7 +823,7 @@ static void slow_work_new_thread_execute(struct slow_work *work)
static const struct slow_work_ops slow_work_new_thread_ops = {
.owner = THIS_MODULE,
.execute = slow_work_new_thread_execute,
#ifdef CONFIG_SLOW_WORK_PROC
#ifdef CONFIG_SLOW_WORK_DEBUG
.desc = slow_work_new_thread_desc,
#endif
};
@ -1055,9 +1055,15 @@ static int __init init_slow_work(void)
if (slow_work_max_max_threads < nr_cpus * 2)
slow_work_max_max_threads = nr_cpus * 2;
#endif
#ifdef CONFIG_SLOW_WORK_PROC
proc_create("slow_work_rq", S_IFREG | 0400, NULL,
&slow_work_runqueue_fops);
#ifdef CONFIG_SLOW_WORK_DEBUG
{
struct dentry *dbdir;
dbdir = debugfs_create_dir("slow_work", NULL);
if (dbdir && !IS_ERR(dbdir))
debugfs_create_file("runqueue", S_IFREG | 0400, dbdir,
NULL, &slow_work_runqueue_fops);
}
#endif
return 0;
}

6
kernel/slow-work.h
View file

@ -19,7 +19,7 @@
/*
* slow-work.c
*/
#ifdef CONFIG_SLOW_WORK_PROC
#ifdef CONFIG_SLOW_WORK_DEBUG
extern struct slow_work *slow_work_execs[];
extern pid_t slow_work_pids[];
extern rwlock_t slow_work_execs_lock;
@ -30,9 +30,9 @@ extern struct list_head vslow_work_queue;
extern spinlock_t slow_work_queue_lock;
/*
* slow-work-proc.c
* slow-work-debugfs.c
*/
#ifdef CONFIG_SLOW_WORK_PROC
#ifdef CONFIG_SLOW_WORK_DEBUG
extern const struct file_operations slow_work_runqueue_fops;
extern void slow_work_new_thread_desc(struct slow_work *, struct seq_file *);