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SUNRPC: Clean up the initialisation of priority queue scheduling info.

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We want the default scheduling priority (priority == 0) to remain
RPC_PRIORITY_NORMAL.

Also ensure that the priority wait queue scheduling is per process id
instead of sometimes being per thread, and sometimes being per inode.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust
2007-07-14 15:40:00 -04:00
parent c970aa85e7
commit 3ff7576dda
5 changed files with 29 additions and 42 deletions
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30
net/sunrpc/sched.c
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@@ -135,7 +135,7 @@ static void __rpc_add_wait_queue_priority(struct rpc_wait_queue *queue, struct r
if (unlikely(task->tk_priority > queue->maxpriority))
q = &queue->tasks[queue->maxpriority];
list_for_each_entry(t, q, u.tk_wait.list) {
if (t->tk_cookie == task->tk_cookie) {
if (t->tk_owner == task->tk_owner) {
list_add_tail(&task->u.tk_wait.list, &t->u.tk_wait.links);
return;
}
@@ -208,26 +208,26 @@ static inline void rpc_set_waitqueue_priority(struct rpc_wait_queue *queue, int
queue->count = 1 << (priority * 2);
}
static inline void rpc_set_waitqueue_cookie(struct rpc_wait_queue *queue, unsigned long cookie)
static inline void rpc_set_waitqueue_owner(struct rpc_wait_queue *queue, pid_t pid)
{
queue->cookie = cookie;
queue->owner = pid;
queue->nr = RPC_BATCH_COUNT;
}
static inline void rpc_reset_waitqueue_priority(struct rpc_wait_queue *queue)
{
rpc_set_waitqueue_priority(queue, queue->maxpriority);
rpc_set_waitqueue_cookie(queue, 0);
rpc_set_waitqueue_owner(queue, 0);
}
static void __rpc_init_priority_wait_queue(struct rpc_wait_queue *queue, const char *qname, int maxprio)
static void __rpc_init_priority_wait_queue(struct rpc_wait_queue *queue, const char *qname, unsigned char nr_queues)
{
int i;
spin_lock_init(&queue->lock);
for (i = 0; i < ARRAY_SIZE(queue->tasks); i++)
INIT_LIST_HEAD(&queue->tasks[i]);
queue->maxpriority = maxprio;
queue->maxpriority = nr_queues - 1;
rpc_reset_waitqueue_priority(queue);
#ifdef RPC_DEBUG
queue->name = qname;
@@ -236,12 +236,12 @@ static void __rpc_init_priority_wait_queue(struct rpc_wait_queue *queue, const c
void rpc_init_priority_wait_queue(struct rpc_wait_queue *queue, const char *qname)
{
__rpc_init_priority_wait_queue(queue, qname, RPC_PRIORITY_HIGH);
__rpc_init_priority_wait_queue(queue, qname, RPC_NR_PRIORITY);
}
void rpc_init_wait_queue(struct rpc_wait_queue *queue, const char *qname)
{
__rpc_init_priority_wait_queue(queue, qname, 0);
__rpc_init_priority_wait_queue(queue, qname, 1);
}
EXPORT_SYMBOL_GPL(rpc_init_wait_queue);
@@ -456,12 +456,12 @@ static struct rpc_task * __rpc_wake_up_next_priority(struct rpc_wait_queue *queu
struct rpc_task *task;
/*
* Service a batch of tasks from a single cookie.
* Service a batch of tasks from a single owner.
*/
q = &queue->tasks[queue->priority];
if (!list_empty(q)) {
task = list_entry(q->next, struct rpc_task, u.tk_wait.list);
if (queue->cookie == task->tk_cookie) {
if (queue->owner == task->tk_owner) {
if (--queue->nr)
goto out;
list_move_tail(&task->u.tk_wait.list, q);
@@ -470,7 +470,7 @@ static struct rpc_task * __rpc_wake_up_next_priority(struct rpc_wait_queue *queu
* Check if we need to switch queues.
*/
if (--queue->count)
goto new_cookie;
goto new_owner;
}
/*
@@ -492,8 +492,8 @@ static struct rpc_task * __rpc_wake_up_next_priority(struct rpc_wait_queue *queu
new_queue:
rpc_set_waitqueue_priority(queue, (unsigned int)(q - &queue->tasks[0]));
new_cookie:
rpc_set_waitqueue_cookie(queue, task->tk_cookie);
new_owner:
rpc_set_waitqueue_owner(queue, task->tk_owner);
out:
__rpc_wake_up_task(task);
return task;
@@ -830,8 +830,8 @@ void rpc_init_task(struct rpc_task *task, const struct rpc_task_setup *task_setu
task->tk_garb_retry = 2;
task->tk_cred_retry = 2;
task->tk_priority = RPC_PRIORITY_NORMAL;
task->tk_cookie = (unsigned long)current;
task->tk_priority = task_setup_data->priority - RPC_PRIORITY_LOW;
task->tk_owner = current->tgid;
/* Initialize workqueue for async tasks */
task->tk_workqueue = rpciod_workqueue;