#include <linux/kthread.h>
#include <sys/types.h>
#include <sys/thread.h>
+#include <sys/rwlock.h>
#define TASKQ_NAMELEN 31
typedef struct taskq {
spinlock_t tq_lock; /* protects taskq_t */
char *tq_name; /* taskq name */
+ int tq_instance; /* instance of tq_name */
struct list_head tq_thread_list; /* list of all threads */
struct list_head tq_active_list; /* list of active threads */
int tq_nactive; /* # of active threads */
int tq_nspawn; /* # of threads being spawned */
int tq_maxthreads; /* # of threads maximum */
int tq_pri; /* priority */
- int tq_minalloc; /* min task_t pool size */
- int tq_maxalloc; /* max task_t pool size */
- int tq_nalloc; /* cur task_t pool size */
+ int tq_minalloc; /* min taskq_ent_t pool size */
+ int tq_maxalloc; /* max taskq_ent_t pool size */
+ int tq_nalloc; /* cur taskq_ent_t pool size */
uint_t tq_flags; /* flags */
taskqid_t tq_next_id; /* next pend/work id */
taskqid_t tq_lowest_id; /* lowest pend/work id */
- struct list_head tq_free_list; /* free task_t's */
- struct list_head tq_pend_list; /* pending task_t's */
- struct list_head tq_prio_list; /* priority pending task_t's */
- struct list_head tq_delay_list; /* delayed task_t's */
+ struct list_head tq_free_list; /* free taskq_ent_t's */
+ struct list_head tq_pend_list; /* pending taskq_ent_t's */
+ struct list_head tq_prio_list; /* priority pending taskq_ent_t's */
+ struct list_head tq_delay_list; /* delayed taskq_ent_t's */
+ struct list_head tq_taskqs; /* all taskq_t's */
wait_queue_head_t tq_work_waitq; /* new work waitq */
wait_queue_head_t tq_wait_waitq; /* wait waitq */
tq_lock_role_t tq_lock_class; /* class when taking tq_lock */
/* Global system-wide dynamic task queue available for all consumers */
extern taskq_t *system_taskq;
+/* List of all taskqs */
+extern struct list_head tq_list;
+extern struct rw_semaphore tq_list_sem;
+
extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *,
uint_t, clock_t);
#include <sys/kmem.h>
#include <sys/kmem_cache.h>
#include <sys/vmem.h>
+#include <sys/taskq.h>
#include <linux/ctype.h>
#include <linux/kmod.h>
#include <linux/seq_file.h>
static struct proc_dir_entry *proc_spl = NULL;
static struct proc_dir_entry *proc_spl_kmem = NULL;
static struct proc_dir_entry *proc_spl_kmem_slab = NULL;
+static struct proc_dir_entry *proc_spl_taskq_all = NULL;
+static struct proc_dir_entry *proc_spl_taskq = NULL;
struct proc_dir_entry *proc_spl_kstat = NULL;
static int
return (rc);
}
+static void
+taskq_seq_show_headers(struct seq_file *f)
+{
+ seq_printf(f, "%-25s %5s %5s %5s %5s %5s %5s %12s %5s %10s\n",
+ "taskq", "act", "nthr", "spwn", "maxt", "pri",
+ "mina", "maxa", "cura", "flags");
+}
+
+/* indices into the lheads array below */
+#define LHEAD_PEND 0
+#define LHEAD_PRIO 1
+#define LHEAD_DELAY 2
+#define LHEAD_WAIT 3
+#define LHEAD_ACTIVE 4
+#define LHEAD_SIZE 5
+
+static int
+taskq_seq_show_impl(struct seq_file *f, void *p, boolean_t allflag)
+{
+ taskq_t *tq = p;
+ taskq_thread_t *tqt;
+ wait_queue_t *wq;
+ struct task_struct *tsk;
+ taskq_ent_t *tqe;
+ char name[100];
+ struct list_head *lheads[LHEAD_SIZE], *lh;
+ static char *list_names[LHEAD_SIZE] =
+ {"pend", "prio", "delay", "wait", "active" };
+ int i, j, have_lheads = 0;
+ unsigned long wflags, flags;
+
+ spin_lock_irqsave_nested(&tq->tq_lock, flags, tq->tq_lock_class);
+ spin_lock_irqsave(&tq->tq_wait_waitq.lock, wflags);
+
+ /* get the various lists and check whether they're empty */
+ lheads[LHEAD_PEND] = &tq->tq_pend_list;
+ lheads[LHEAD_PRIO] = &tq->tq_prio_list;
+ lheads[LHEAD_DELAY] = &tq->tq_delay_list;
+ lheads[LHEAD_WAIT] = &tq->tq_wait_waitq.task_list;
+ lheads[LHEAD_ACTIVE] = &tq->tq_active_list;
+
+ for (i = 0; i < LHEAD_SIZE; ++i) {
+ if (list_empty(lheads[i]))
+ lheads[i] = NULL;
+ else
+ ++have_lheads;
+ }
+
+ /* early return in non-"all" mode if lists are all empty */
+ if (!allflag && !have_lheads) {
+ spin_unlock_irqrestore(&tq->tq_wait_waitq.lock, wflags);
+ spin_unlock_irqrestore(&tq->tq_lock, flags);
+ return (0);
+ }
+
+ /* unlock the waitq quickly */
+ if (!lheads[LHEAD_WAIT])
+ spin_unlock_irqrestore(&tq->tq_wait_waitq.lock, wflags);
+
+ /* show the base taskq contents */
+ snprintf(name, sizeof(name), "%s/%d", tq->tq_name, tq->tq_instance);
+ seq_printf(f, "%-25s ", name);
+ seq_printf(f, "%5d %5d %5d %5d %5d %5d %12d %5d %10x\n",
+ tq->tq_nactive, tq->tq_nthreads, tq->tq_nspawn,
+ tq->tq_maxthreads, tq->tq_pri, tq->tq_minalloc, tq->tq_maxalloc,
+ tq->tq_nalloc, tq->tq_flags);
+
+ /* show the active list */
+ if (lheads[LHEAD_ACTIVE]) {
+ j = 0;
+ list_for_each_entry(tqt, &tq->tq_active_list, tqt_active_list) {
+ if (j == 0)
+ seq_printf(f, "\t%s:", list_names[LHEAD_ACTIVE]);
+ else if (j == 2) {
+ seq_printf(f, "\n\t ");
+ j = 0;
+ }
+ seq_printf(f, " [%d]%pf(%ps)",
+ tqt->tqt_thread->pid,
+ tqt->tqt_task->tqent_func,
+ tqt->tqt_task->tqent_arg);
+ ++j;
+ }
+ seq_printf(f, "\n");
+ }
+
+ for (i = LHEAD_PEND; i <= LHEAD_WAIT; ++i)
+ if (lheads[i]) {
+ j = 0;
+ list_for_each(lh, lheads[i]) {
+ /* show the wait waitq list */
+ if (i == LHEAD_WAIT) {
+ wq = list_entry(lh, wait_queue_t, task_list);
+ if (j == 0)
+ seq_printf(f, "\t%s:",
+ list_names[i]);
+ else if (j == 12) {
+ seq_printf(f, "\n\t ");
+ j = 0;
+ }
+ tsk = wq->private;
+ seq_printf(f, " %d", tsk->pid);
+ /* pend, prio and delay lists */
+ } else {
+ tqe = list_entry(lh, taskq_ent_t,
+ tqent_list);
+ if (j == 0)
+ seq_printf(f, "\t%s:",
+ list_names[i]);
+ else if (j == 2) {
+ seq_printf(f, "\n\t ");
+ j = 0;
+ }
+ seq_printf(f, " %pf(%ps)",
+ tqe->tqent_func,
+ tqe->tqent_arg);
+ }
+ ++j;
+ }
+ seq_printf(f, "\n");
+ }
+ if (lheads[LHEAD_WAIT])
+ spin_unlock_irqrestore(&tq->tq_wait_waitq.lock, wflags);
+ spin_unlock_irqrestore(&tq->tq_lock, flags);
+
+ return (0);
+}
+
+static int
+taskq_all_seq_show(struct seq_file *f, void *p)
+{
+ return (taskq_seq_show_impl(f, p, B_TRUE));
+}
+
+static int
+taskq_seq_show(struct seq_file *f, void *p)
+{
+ return (taskq_seq_show_impl(f, p, B_FALSE));
+}
+
+static void *
+taskq_seq_start(struct seq_file *f, loff_t *pos)
+{
+ struct list_head *p;
+ loff_t n = *pos;
+
+ down_read(&tq_list_sem);
+ if (!n)
+ taskq_seq_show_headers(f);
+
+ p = tq_list.next;
+ while (n--) {
+ p = p->next;
+ if (p == &tq_list)
+ return (NULL);
+ }
+
+ return (list_entry(p, taskq_t, tq_taskqs));
+}
+
+static void *
+taskq_seq_next(struct seq_file *f, void *p, loff_t *pos)
+{
+ taskq_t *tq = p;
+
+ ++*pos;
+ return ((tq->tq_taskqs.next == &tq_list) ?
+ NULL : list_entry(tq->tq_taskqs.next, taskq_t, tq_taskqs));
+}
+
static void
slab_seq_show_headers(struct seq_file *f)
{
.release = seq_release,
};
+static void
+taskq_seq_stop(struct seq_file *f, void *v)
+{
+ up_read(&tq_list_sem);
+}
+
+static struct seq_operations taskq_all_seq_ops = {
+ .show = taskq_all_seq_show,
+ .start = taskq_seq_start,
+ .next = taskq_seq_next,
+ .stop = taskq_seq_stop,
+};
+
+static struct seq_operations taskq_seq_ops = {
+ .show = taskq_seq_show,
+ .start = taskq_seq_start,
+ .next = taskq_seq_next,
+ .stop = taskq_seq_stop,
+};
+
+static int
+proc_taskq_all_open(struct inode *inode, struct file *filp)
+{
+ return seq_open(filp, &taskq_all_seq_ops);
+}
+
+static int
+proc_taskq_open(struct inode *inode, struct file *filp)
+{
+ return seq_open(filp, &taskq_seq_ops);
+}
+
+static struct file_operations proc_taskq_all_operations = {
+ .open = proc_taskq_all_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static struct file_operations proc_taskq_operations = {
+ .open = proc_taskq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
static struct ctl_table spl_kmem_table[] = {
#ifdef DEBUG_KMEM
{
goto out;
}
+ proc_spl_taskq_all = proc_create_data("taskq-all", 0444,
+ proc_spl, &proc_taskq_all_operations, NULL);
+ if (proc_spl_taskq_all == NULL) {
+ rc = -EUNATCH;
+ goto out;
+ }
+
+ proc_spl_taskq = proc_create_data("taskq", 0444,
+ proc_spl, &proc_taskq_operations, NULL);
+ if (proc_spl_taskq == NULL) {
+ rc = -EUNATCH;
+ goto out;
+ }
+
proc_spl_kmem = proc_mkdir("kmem", proc_spl);
if (proc_spl_kmem == NULL) {
rc = -EUNATCH;
remove_proc_entry("kstat", proc_spl);
remove_proc_entry("slab", proc_spl_kmem);
remove_proc_entry("kmem", proc_spl);
+ remove_proc_entry("taskq-all", proc_spl);
+ remove_proc_entry("taskq", proc_spl);
remove_proc_entry("spl", NULL);
unregister_sysctl_table(spl_header);
}
remove_proc_entry("kstat", proc_spl);
remove_proc_entry("slab", proc_spl_kmem);
remove_proc_entry("kmem", proc_spl);
+ remove_proc_entry("taskq-all", proc_spl);
+ remove_proc_entry("taskq", proc_spl);
remove_proc_entry("spl", NULL);
ASSERT(spl_header != NULL);
projects / zfs / commitdiff