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authorTejun Heo <tj@kernel.org>2010-07-20 22:09:02 +0200
committerTejun Heo <tj@kernel.org>2010-07-23 13:14:49 +0200
commit181a51f6e040d0ac006d6adaf4a031ffa440f41c (patch)
treeed06062b8c606149497dffbb6a6ef0548cc44911 /kernel/slow-work-debugfs.c
parent6ecd7c2dd9f5dd4f6e8f65c8027159f9c73b0e4c (diff)
downloadop-kernel-dev-181a51f6e040d0ac006d6adaf4a031ffa440f41c.zip
op-kernel-dev-181a51f6e040d0ac006d6adaf4a031ffa440f41c.tar.gz
slow-work: kill it
slow-work doesn't have any user left. Kill it. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'kernel/slow-work-debugfs.c')
-rw-r--r--kernel/slow-work-debugfs.c227
1 files changed, 0 insertions, 227 deletions
diff --git a/kernel/slow-work-debugfs.c b/kernel/slow-work-debugfs.c
deleted file mode 100644
index e45c436..0000000
--- a/kernel/slow-work-debugfs.c
+++ /dev/null
@@ -1,227 +0,0 @@
-/* Slow work debugging
- *
- * Copyright (C) 2009 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-
-#include <linux/module.h>
-#include <linux/slow-work.h>
-#include <linux/fs.h>
-#include <linux/time.h>
-#include <linux/seq_file.h>
-#include "slow-work.h"
-
-#define ITERATOR_SHIFT (BITS_PER_LONG - 4)
-#define ITERATOR_SELECTOR (0xfUL << ITERATOR_SHIFT)
-#define ITERATOR_COUNTER (~ITERATOR_SELECTOR)
-
-void slow_work_new_thread_desc(struct slow_work *work, struct seq_file *m)
-{
- seq_puts(m, "Slow-work: New thread");
-}
-
-/*
- * Render the time mark field on a work item into a 5-char time with units plus
- * a space
- */
-static void slow_work_print_mark(struct seq_file *m, struct slow_work *work)
-{
- struct timespec now, diff;
-
- now = CURRENT_TIME;
- diff = timespec_sub(now, work->mark);
-
- if (diff.tv_sec < 0)
- seq_puts(m, " -ve ");
- else if (diff.tv_sec == 0 && diff.tv_nsec < 1000)
- seq_printf(m, "%3luns ", diff.tv_nsec);
- else if (diff.tv_sec == 0 && diff.tv_nsec < 1000000)
- seq_printf(m, "%3luus ", diff.tv_nsec / 1000);
- else if (diff.tv_sec == 0 && diff.tv_nsec < 1000000000)
- seq_printf(m, "%3lums ", diff.tv_nsec / 1000000);
- else if (diff.tv_sec <= 1)
- seq_puts(m, " 1s ");
- else if (diff.tv_sec < 60)
- seq_printf(m, "%4lus ", diff.tv_sec);
- else if (diff.tv_sec < 60 * 60)
- seq_printf(m, "%4lum ", diff.tv_sec / 60);
- else if (diff.tv_sec < 60 * 60 * 24)
- seq_printf(m, "%4luh ", diff.tv_sec / 3600);
- else
- seq_puts(m, "exces ");
-}
-
-/*
- * Describe a slow work item for debugfs
- */
-static int slow_work_runqueue_show(struct seq_file *m, void *v)
-{
- struct slow_work *work;
- struct list_head *p = v;
- unsigned long id;
-
- switch ((unsigned long) v) {
- case 1:
- seq_puts(m, "THR PID ITEM ADDR FL MARK DESC\n");
- return 0;
- case 2:
- seq_puts(m, "=== ===== ================ == ===== ==========\n");
- return 0;
-
- case 3 ... 3 + SLOW_WORK_THREAD_LIMIT - 1:
- id = (unsigned long) v - 3;
-
- read_lock(&slow_work_execs_lock);
- work = slow_work_execs[id];
- if (work) {
- smp_read_barrier_depends();
-
- seq_printf(m, "%3lu %5d %16p %2lx ",
- id, slow_work_pids[id], work, work->flags);
- slow_work_print_mark(m, work);
-
- if (work->ops->desc)
- work->ops->desc(work, m);
- seq_putc(m, '\n');
- }
- read_unlock(&slow_work_execs_lock);
- return 0;
-
- default:
- work = list_entry(p, struct slow_work, link);
- seq_printf(m, "%3s - %16p %2lx ",
- work->flags & SLOW_WORK_VERY_SLOW ? "vsq" : "sq",
- work, work->flags);
- slow_work_print_mark(m, work);
-
- if (work->ops->desc)
- work->ops->desc(work, m);
- seq_putc(m, '\n');
- return 0;
- }
-}
-
-/*
- * map the iterator to a work item
- */
-static void *slow_work_runqueue_index(struct seq_file *m, loff_t *_pos)
-{
- struct list_head *p;
- unsigned long count, id;
-
- switch (*_pos >> ITERATOR_SHIFT) {
- case 0x0:
- if (*_pos == 0)
- *_pos = 1;
- if (*_pos < 3)
- return (void *)(unsigned long) *_pos;
- if (*_pos < 3 + SLOW_WORK_THREAD_LIMIT)
- for (id = *_pos - 3;
- id < SLOW_WORK_THREAD_LIMIT;
- id++, (*_pos)++)
- if (slow_work_execs[id])
- return (void *)(unsigned long) *_pos;
- *_pos = 0x1UL << ITERATOR_SHIFT;
-
- case 0x1:
- count = *_pos & ITERATOR_COUNTER;
- list_for_each(p, &slow_work_queue) {
- if (count == 0)
- return p;
- count--;
- }
- *_pos = 0x2UL << ITERATOR_SHIFT;
-
- case 0x2:
- count = *_pos & ITERATOR_COUNTER;
- list_for_each(p, &vslow_work_queue) {
- if (count == 0)
- return p;
- count--;
- }
- *_pos = 0x3UL << ITERATOR_SHIFT;
-
- default:
- return NULL;
- }
-}
-
-/*
- * set up the iterator to start reading from the first line
- */
-static void *slow_work_runqueue_start(struct seq_file *m, loff_t *_pos)
-{
- spin_lock_irq(&slow_work_queue_lock);
- return slow_work_runqueue_index(m, _pos);
-}
-
-/*
- * move to the next line
- */
-static void *slow_work_runqueue_next(struct seq_file *m, void *v, loff_t *_pos)
-{
- struct list_head *p = v;
- unsigned long selector = *_pos >> ITERATOR_SHIFT;
-
- (*_pos)++;
- switch (selector) {
- case 0x0:
- return slow_work_runqueue_index(m, _pos);
-
- case 0x1:
- if (*_pos >> ITERATOR_SHIFT == 0x1) {
- p = p->next;
- if (p != &slow_work_queue)
- return p;
- }
- *_pos = 0x2UL << ITERATOR_SHIFT;
- p = &vslow_work_queue;
-
- case 0x2:
- if (*_pos >> ITERATOR_SHIFT == 0x2) {
- p = p->next;
- if (p != &vslow_work_queue)
- return p;
- }
- *_pos = 0x3UL << ITERATOR_SHIFT;
-
- default:
- return NULL;
- }
-}
-
-/*
- * clean up after reading
- */
-static void slow_work_runqueue_stop(struct seq_file *m, void *v)
-{
- spin_unlock_irq(&slow_work_queue_lock);
-}
-
-static const struct seq_operations slow_work_runqueue_ops = {
- .start = slow_work_runqueue_start,
- .stop = slow_work_runqueue_stop,
- .next = slow_work_runqueue_next,
- .show = slow_work_runqueue_show,
-};
-
-/*
- * open "/sys/kernel/debug/slow_work/runqueue" to list queue contents
- */
-static int slow_work_runqueue_open(struct inode *inode, struct file *file)
-{
- return seq_open(file, &slow_work_runqueue_ops);
-}
-
-const struct file_operations slow_work_runqueue_fops = {
- .owner = THIS_MODULE,
- .open = slow_work_runqueue_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
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